Animaniacs: Whenever someone mentions the Warner brothers, expect Dot to pipe up with "And the Warner sister!"
The Archer episode "Skytanic" has the repeated insistence that the titular ship isn't a zeppelin, but a rigid airship filled with helium. Archer never gets it, constantly referring to the thing as a hydrogen-filled death trap.
Lana: ...and what part of that are you still not getting?
Archer: Well, obviously the whole concept, Lana! We didn't all go to science camp!
EVERYONE refers to Trinette's son as "the wee baby Seamus." Every. Single. Time.
Ray's brother Randy isn't a drug dealer, he's a drug farmer
The Boondocks features recurring character "A Pimp Named Slickback", who gets flustered whenever people refer to him simply as Slickback and constantly has to correct them. A Pimp Named Slickback actually makes this correction a part of his introduction in one episode: "Please say the entire thing. Yes, that includes the 'A Pimp Named' part. Yes, every time."
In Code Lyoko, when Odd Della Robia is called "scrawny" or "skinny", he always corrects them by saying he's "svelte".
In Cranberry Christmas, Mr. Whiskers and Cyrus Grape get into an argument over who owns a nearby body of water, and whether or not it is a pond or a cranberry bog. Any time it is mentioned throughout the special, the other will insist that his term is the correct one. Cyrus even does this to the audience. "That's right, I said pond."
Like Greg from Diary of a Wimpy Kid (see Literature above), Doug insists that his journal is not a diary.
DuckTales episode "Once Upon a Dime" had Scrooge McDuck wearing a kilt and correcting some non-Scots who called it a skirt.
On Family Guy, Peter learns he has a black ancestor who was a slave and tries to embrace his roots, adopting the name "Kichwa Tembo", which he insists on being called, until his father-in-law offers him reparations.
Carter: Not enough? Fine. Make it $20,000. How do you spell Kichwa?
Peter: Yeah, you know what? Screw the Kichwa. Make it out to Peter. P-E-T-E...
In an episode of The Flintstones, Fred is employed as an apartment complex's janitor. "Not janitor! Resident stationary engineer!"
Before Stan clarified to the desk clerk that he and Ollie were looking for jobs, Ollie said they were on a business travel.
In the Wizard of Oz parody episode of Phineas and Ferb, Doctor Doofenshmirtz (playing the Wicked Witch of the West) is insistent that he's a warlock, not a witch. The credits even list him as "Doofenwitch," with "witch" crossed out and replaced with "warlock".
From the episode "Candace Gets Busted": It's not a party, it's an intimate get-together!
Buford wasn't crying. He was sweating through his eyes. Major Monogram later said the same thing in the movie. (see above)
Again with Buford when he allowed Doofenshmirtz and his date to enter Phineas and Ferb's platypus-themed restaurant without a reservation. Doof didn't bribe Buford. He, to quote Buford, "caught my attention in a monetary fashion".
In an episode of Rocky and Bullwinkle, a Southern Gentleman insists that people call The American Civil War "The War Between The States". This sort of bickering over historical and political terminology is very much Truth in Television. Actually he gets peeved over any word or phrase that even sounds like "Civil". When the next episode was going to be titled "Civil Defense", he angrily blustered, "War — I say — War between the States Defense!" He relents after the war is reenacted (on the football field) and the South wins.
Girl: Milhouse has cooties! Milhouse: It's called lice, and it's nothing to be ashamed of!
Homer meeting the President of the Globex Corporation:
Homer: Wow, my boss.
Hank Scorpio: Don't call me that word. I don't like things that elevate me above the other people. I'm just like you. Oh, sure, I come later in the day, I get paid a lot more, and I take longer vacations, but I don't like the word "boss".
In one episode, Lisa points out that she's a perfectly reasonable child in order to stand up for children's rights at the town hall. An onlooker immediately reacts in shock, saying that he'd thought she was a midget. "First of all, they prefer to be called 'little people,' and secondly..."
In a parody of Artificial Intelligence, there was a robot urinal that doesn't like being called an urinal-bot. He prefers to be called "Lava-tron".
The man Marge bought a ticket from wasn't a scalper. He was a "dude whose 200 friends did not show up".
The Springfield Nuclear Power Plant melts down once, but meltdown is "one of those annoying buzzwords. We prefer to call it an unrequested fission surplus." Homer saves the plant/town through sheer dumb luck.
This exchange in "G.I. (Annoyed Grunt)":
Superintendent Chalmers: I'm bald-ing! Why does nobody honor the "ding?"
Homer does not want to take a vacation in Florida ("America's wang"). "They prefer the Sunshine State," though.note Very much Truth in Television, as this is the state's official nickname. For every sunny day, though, there's a pretty high hurricane risk.
When Lisa and Bart unleash a zombie plague on Springfield, he chides her for calling them zombies: "They prefer to be called the living impaired."
This exchange from "Treehouse of Horror VII" section The Thing and I:
Dr. Hibbert: You don't forget a thing like... Siamese twins!
Lisa: I believe they prefer to be called "conjoined twins".
Dr. Hibbert: And hillbillies prefer to be called "sons of the soil", but it ain't gonna happen.
The writers insist that Waylon Smithers is not gay, he is a "Burns-sexual".
From Sofia the First "The Floating Palace": Oona constantly corrects anyone who refers to her sunken ship hideaway as a "shipwreck."