a KWYJIBO is a rule, idea, or excuse. made up on the fly to cheat in a board or video game.

originating from the season one episode 2 "bart the genius" episode of the simpsons where during a gem of scrabble he spells the word "KWYJIBO" and describes it as "a big, dumb, balding North American ape with no chin" as an attempt to get out of the game early
"dude you cant do that its against the rules to do that"1
"since when?" 2
"since forever!" 1
"your full of it thats a total KWYJIBO"
by C.T Tracy July 25, 2024
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A big, dumb, balding North American ape with no chin and a short temper.
Kwyjibo on the loose!
by SimpsonsFan1969 July 16, 2023
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