an exclamation made by legendary people when they realise that they have made a mistake. making a genuine mistake is a rare occasion for sayers of oopsie poopsie, therefore it is often used by these people sarcastically because they are hilarious. synonyms include mistake and gosh darn.
teacher: come here, katherine.
katherine: ok mom.

(blushes)

i mean, miss.
frank: lolllll katherine just made a big phat oopsie poopsie..
by nonamesarefree January 30, 2019
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Over zealous sex that leads to an accidental poopchute insertion. The poopchute hurts, the peen is shit-stained...its a bad situation.
Lee got so hot and bothered we had an "oopsie poopsie", and then she continuted on to have diahrea all over the bed.
by simples666 November 18, 2010
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<expression> an expression used after a sloppy wet fart marks your undies with a huge soaking mudtrack
"She screamed 'oopsie poopsie' that night after the date to the indian restaraunt"
by Fucknuggets June 13, 2008
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This happens when baileys jumps on Oliver’s back and gets too excited and real eases his doo doo all in and around Oliver’s mouth
Bailey says “oopsie poopsieOliver’s im sorry
by Dilara:) October 24, 2023
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