Real-life dog killer/horrendous human being Kristi Noem is shown graphically shooting and killing many cute dogs and puppies during the entire episode.
Kenny Dies: Stan unfortunately does not make it to the hospital before Kenny passes and is heartbroken to learn that his final words were him asking where he was
It doesn't actually happen, but Steven Stotch takes his belt off with the intention of hitting Butters with it. Could be triggering since Butters is visibly scared and Steven is yelling. (The way he does it implies that it's happened before)
Some instances, a few of the more infamous ones being in Season 11’s “The China Problem” where Indiana Jones is raped onscreen three times as a joke. One of these scenes recreates the rape scene from Boys Don’t Cry, a biopic about the real rape and murder of a trans man.
In "Cripple Fight", the new leader of the scouts threatens the boys not to tell anyone about the child pornography he produced of them by smashing his hand (inside a puppet) repeatedly with a hammer. This leaves blood on the table.
Ike is kidnapped by his kindergarten teacher for reasons that fall under a different category, however he does get returned to his parents by the end of the episode
The old woman with the pie problem dies during a re-enactment scene, but not in the actual show canon. It is a gruesome and bloody scene involving decapitation and dismemberment of a corpse.
People at/near the meth lab and strip club also die during shootings/fires/blowups.
Jimmy Valmer and Timmy Burch are played by Trey Parker. It's a pretty good performance and not intended to be offensive towards disabled people, but I can understand people being annoyed at it.
Cartman gets Scott tenormans parents killed (not shown on screen, if it is its really brief) and made into chili which scott ends up eating. Not much gore, only a finger is pulled out the chili.
season 1
ep 1 (Cartman Gets an Anal Probe) 8:41 and 1:58 and 2:03 and 3:15 and 20:23 all these timestamps are when Wendy is talking to Stan (a common joke in the series)
ep 7 (Pink eye) 20:30 Wendy talks to Stan
Ep 11 (tom's rinoplasty) 2:26 and 2:36 and 4:58 and 5:36 and 6:00 and 8:15 to 8:20 and 9:46 and 3:49 and 7:44. This is surely the episode with the most v* scene. Each time it's when the professor talks to Stan and once it's Mr. Garisson who v* after his operation
Ep 13 (Cartman's mom is a durty slurt) 5:56 a drunk man v* and 9:31 another drunk man v*
season 2
Ep 2 (Cartman's Mom Is Still a Dirty Slut) 13:25 Stan v* during the operation and 20:43 (SPOILER) Mephesto announces that Liane is hermafrodite and everyone in the room v*
Ep 9 (chef's chocolate salty balls) 4:39 Stan is disgusted by a scene from "Brokeback Mountain" and 4:49 Wendy talks to Stan
Ep 17 (gnomes) 6:48 Cartman v* after drinking too much coffee and 7:14 he v* a second time
Ep 18 (prehistoric ice man) 2:28 Stan v* when trying to save Kyle from a cave
Season 3
ep 12 (korn's groovy pirate ghost mystery) 19:49 to 19:55 the dog v* the corpse of Kyle's grandmother
Ep 14 (The red badge of gayness) 4:42 a drunken man v* and 7:40 Jimbo v* and 12:03 a drunken man v*
Ep 16 (Are You There God? It's Me, Jesus) 15:00 Kenny v* blood
season 4
Ep 6 (Cartman joins nambla) 4:13 Stuart v* after Kenny kicks him in the balls and 10:58 to 11:12 Stuart v* after drinking a glass full of medicine and 12:57 to 13:11 Stuart v* after doing a ride at a funfair
Ep 7 (cherokee hair tampons) 7:18 Kyle v* when he's s*ck
Ep 12 (fourth grade) 6:37 Chief v*
Ep 13 (trapper keeper) 12:54 the s*ck child v* his lung and 20:13 the monster (which is actually Cartman) v*
Ep 15 (fat camp) 5:52 to 6:25 Kenny v* after eating a manatee kidney
season 5
Ep 1 (it hits the fan) 4:48 and 7:16 and 11:53 and 21:34. Throughout the episode, a virus develops after overusing the word
"shit" and one of the symptoms is v* of the intestines.
ep 4 (scott tenorman must die) 20:38 Scott Tenorman v*
ep 9 (Osama bin Laden Has Farty Pants) 9:43 stewart v* after smelling cartman farts
Ep 11 (the entity) 18:49 Kyle's cousin v* on the plane. Audio only.
season 6
Ep 1 (Jared has haires) 6:42 and 6:47 and 7:04 Butters tries to eat while extremely full
Ep 8 (Red Hot Catholic Love) 7:45 and 10:39 and 17:14 and 17:27 and 19:52 and 20:36 throughout the episode. The characters eat by the ass and shit by the mouth (Yes you read that right) It's not really v* but it looks like it and therefore it can trigger
Ep 14 (the death camp of tolerance) 21:08 Mr Slave v* Lemmiwinks
Season 7
Ep 3 (toilet papers) 12:30 the cashier v*
Ep 13 (butt out) 3:57 Stan v* after smoking
Season 8
Ep 3 (the passion of the jew) 4:05 Kyle v* when he watches "the passion of the christ"
Ep 6 (the jeffersons) 13:19 Harrsion Yates v* when he realizes that mr Jefferson is not black (parody of some cops who want to put innocent black people in jail just for their skin color)
Ep 12 (Stupid Spoiled Whore Video playset) 1:23 & 1:48 & 3:05 & 8:30 & 8:33 Paris Hilton v*
season 9
Ep 2 (die hippie die) 10:01 Randy (in hippie) v*
Ep 14 (bloody Mary) 3:46 Randy (drunk) v* during a alcohol test
Season 10
Ep 5 (a million little fibers) 17:17 ophra's asshole v* and ophra's vagina v* after (yes you read that right)
Ep 7 (tsst) 19:28 Cartman v* black liquid
ep 10 (Miss Teacher Bangs a boy) 19:20 a man v* after being sprayed with tear gas by Cartman
Season 11
Ep 6 (D-YKES !) 12:42 mrs Garisson kicks a man in the balls and he v*
ep 13 (guitar queer-o) 16:09 Stan v* after playing too much "heroin héro" (metaphor for heroin)
ep 14 (the list) 21:43 Wendy talks to Stan
season 12
Ep 3 (major boobage) 10:35 Kenny v* after getting off the trip
ep 6 (over logging) 17:42 to 18:01 Randy watches porn where girls v* in their mouths (audio only)
Ep 8 (the Chinna probrem) 5:44 Kyle saw Indiana Jones being raped (metaphor)
Ep 9 (breast cancer show ever) 9:08 Cartman v* his panties
Ep 12 (about last night...) 4:45 and 16:20 and 16:36 many person are drunk while celebrating Obama victory
Ep 14 (the ungoundable) 14:02 Butters v* in Cartman's room when he thinks back to the taste of blood (which is actually tomato juice)
Season 13
Ep 5 (fishstick) 4:14 a man laughs so much he v*
Ep 12 (the F word) 8:13 one of the motorcycle rider v* when he realizes that Cartman shit on his motorcycle
Season 14
Ep 2 (the tale of Scrootie Mcboogerballs) 4:31 to 4:50 and 5:28 to 6:39 and 9:02 to 9:08 and 9:19 to 9:44 and 11:18 and 12:26 to 12:46 and 12:57 to 13:35 and 14:55. The episode with the most v* scene: the 4 main characters have written a book so vulgar that every time someone reads it, they v*
Ep 5 (200) 2:44 Paris Hilton v*
Ep 7 (crippled summer) 4:59 towelie v* at summer camp
season 15
Ep 7 (your getting old) 9:42 to 9:58 and 17:14 to 17:21 and 18:01 to 18:09 and 21:33 throughout the episode Stan to hallucinations of people who spits shit. Not v* but it looks a lot like it
Ep 8 (ass burger) 5:36 to 5:49 Stan is drunk and v* and 2:35 the president duck spits shit (as in the previous episode) and 3:59 Stan is drunk and v*
ep 12 (1%) 7:32 Cartman v* when he sees Clyde the frog tied to the tree
Season 16
Ep 4 (jewpacabra) 18:20 two children v* blood
Ep 6 (I should never gone ziplined) 16:57 Kyle v*. This scene is much more triggering than the others because it is not in animation but in live-action. For the first time in the show, there is a scene with real actors and during this scene there is a vomiting scene so it is as triggering as a normal vomiting scene in a movie
Ep 14: (Obama wins !) 13:03 the return of the shit-spitting duck president
Season 17 and 18 are safe
season 19
ep 1 (stunning and brave) 16:48 to 16:51 Randy v* when he is hungover
ep 5 (safe space) 16:06 Butters v* as he sorts through Courtney Love's comments
Season 20
Ep 5 (douche and a Dansih) 7:06 BB v*.
Ep 7 (oh jeez) 0:39 a drunk man v* when he leaves the community center. and 7:53 Cathlyn Jenner v* member-berries juice and 6:09 to 6:15 Randy v* memeber-berries juice
season 21
ep 5 (humelle and heroine) 1:30 the mascot v* and 8:36 the policeman v* during the autopsy
Ep 10 (splatty tomatoes) 16:10 to 16:15 and 16:28 to 16:49 all the characters realize that principal PC and vice principal stroung woman are having sex and 18:49 Sharron v* on Randy when he what they saw
Season 22
Ep 5 (the scoots) 18:42 Stan v* because he ate too much candy. It's hard to know if he v* or if he spits
season 23
Ep 8 (turd burglars) 1:03 and 9:14 and 3:22 and 4:02 and 4:14 and 4:18 to 4:27. Lots of v* in this episode
In "The New Terrance and Phillip Movie Trailer", there is a gag where Stan's older sister reportedly had just started her period and tells him and his friends that she'll let them watch a specific TV show if they bring her tampons. Butters is sent to get her tampons but forgets about bringing them to her, leading to a scene where Stan opens the door to the house and the boys are washed away with a torrent of blood.
In episode "Ass Burgers", it's stated that Asperger's Syndrome (a form of autism) isn't real. Stan was also falsely diagnosed with Asperger's Syndrome in the same episode, though it was probably just depression.
Laura (Craig's Mom) is being watched by Cartman, Butters and Kenny with a drone while undressing.
(There's probably more examples of someone being watched, but this is the one that first came up in my head.)
People say the F slur in the episode "It Hits the Fan", but most of it gets bleeped. Mr. Garrison, a gay character, doesn't get bleeped, and for some odd reason, Jimbo doesn't get bleeped either.
In "The Tooth Fairy Tats 2000", Kyle has a running gag where he's pondering existentialism (and fades out of reality towards the end of it) after being told that both the "tooth fairy" and Santa aren't real.