A phrase taken from an episode title of the tv show South Park. Used to tell someone that an idea, phrase or word they think is original or they created has actually already been created/done/said.
Larry: look at this meme I just made
Tom: simpsons did it

Tom: I just thought of a great idea, sliced bread
Larry: simpsons did it
by DJZombieApe February 28, 2017
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A term you refer to when a situation requested by someone has been already done on The Simpsons.

Derives from South Park.
"How about we split the UrbanDictionary into two websites to adapt to the new area code?"
"Simpsons did it!"
by Mister Ignorant May 11, 2004
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A magic wand waved by a fan of a particular show to make accusations that that show ripped off another show disappear.

The line originally appeared on a South Park episode in which a foolish character kept shooting down another's ideas, dismissing them as ones the Simpsons originated, a point he made by annoyingly shouting "Simpsons did it!" The character was straightened out by a wiser character who explained that the Simpsons itself borrowed from other shows--the implicit premise being that everyone steals so no one should complain about it. The unfortunate result is that many people who look to South Park to know what their opinions are, now think that it's foolish to call people on plagiarism.

Now the line can be used more generally to ridicule anyone who points out that an episode of one show is similar to an episode of an older show.
Simpsons fan: Hey, that South Park episode is awfully similar to an episode of The Simpsons that aired last year.

South Park fan: Yeah, whatever. 'Simpsons did it!!! Simpsons did it!!!' That's what you sound like. Ha ha!
by Fusion Hungry Bagel Planet September 22, 2009
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What you say when you overhear someone plotting revenge as an allusion to Dougie from South Park who said it repeatedly to Butters
Carrie: "I took a Louisville slugger to both headlights, slashed a hole in all four tires, and carved my name into his leather seat to avenge my ex-boyfriend for cheating on me".
Karen: "Simpsons did it!"
Miranda: "I walked into a bar and attacked his new girlfriend because I'm an immature little girl who can't get over my ex like he got over me".
Karen: "Simpsons did it, Simpsons did it!"
Carrie: "They did not!"
Karen: "I know. I'm just saying what Dougie said to Butters whenever he plotted revenge against the people who wronged him".
Miranda: "South Park is a stupid show. The main characters think hunting is stupid, so I hate that show".
by chad'srockergrrrll February 15, 2015
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