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Someone who thinks they are a genius, but are, in fact, mentally retarded.
Peter Griffin: I am a genius! In your face Brian! I'm a g-e-a-n-y-i-s!
Brian: No, actually you're not. Actually Peter, it says here that you're mentally retarded.
Peter: I'm mentally re-what-ed? Brian, I'm a genius!
Brian: No Peter, you're a retard.
Stewie: Brian's right father, you're a retarded man. I'm a damn baby and I'm 1,000 times smarter than you.
Peter: You're just mad that I'm way more smarter than you is.
Brian: You're a fucking retard!
Peter: Wait, what were we talking about again Brian?
by Icy Wyte June 26, 2018
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8
The main character of the show Family Guy, the man of the Griffin family. Works in the Happy-Go-Lucky toy factory, and hangs out with his friends Quagmire, Joe, and Cleveland.
"Can't touch me/ STOP, Peter time/ I'm a big shot, there's no doubt/ light a fire then pee it out/ Don't like it, kiss my rump/ Just for a minute, let's all do the bump/ Can't touch me/ Yeah, do the Peter Griffin Bump/ Can't touch me/ I'm Presidential Peter/ Interns think I'm hot/ Don't care if you're handicapped, I'll still park in your spot/ I've been around the world/ from Hartford to Back Bay/ It's Peter, Go Peter, I'm so Peter, Yo Peter, Let's see Regis rap this way/ Can't touch me."
by --Meatwad-- November 26, 2004
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10
The absolute best animated character ever. He stars in the absolute best animated show ever, Family Guy. I am obsessed with that show. If anyone disses Family Guy in my presence, I become very, very angry, and generally do things that I later regret.

Peter Griffin lives with his wife, Lois, and his three kids, Chris, Meg and Stewie, in Quahog, Rhode Island (and sometimes Petoria). He works at Happy-Go-Lucky Toy Factory.

I salute him.
One of Peter Griffin's quotes:

"But still this house is freak-in' sweeeeeeeeeet!!"
by Ben Kenobi May 29, 2005
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11
1. The main character from the TV show "Family Guy". Has a wife (Lois), three kids (Chris, Meg, and Stewie), and a dog (Brian).

2. A German disco singer from the late 70's-early 80's. His real name was Peter Kamp. Some of his hits are "Spiderman", "Step By Step", and "Inside Out"
1. Peter Griffin is freakin' sweet!

2. Peter Griffin made groovy songs!
by swat1975 September 05, 2008
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12
1) A fat man who hates Canada and thinks it sucks. (see episode: The Son Also Draws)
2) Man strongly amused by bathroom humor. IE: "..Duty.. ahahahaha... Diarrhea.. hey.. hey Louis.. Diarrhea!"
3) An New Englander who consumes large amounts of Partucket Pat and drinks for amusement. IE: "Daddy only drank so the Statue of Liberty would take her clothes off"
4) Formerly known as Death for a few hours.
by BeeKaySlacker December 22, 2003
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13
A man with the funniest voice existing in the universe. He is freakin sweet and is part of the most awesomest show ever- family guy.
Peter Griffin rofls my waffles
by loler son April 12, 2008
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