When you don’t make it to the toilet in time and shit your pants.
Today Bobo had to clean up his oopsie poopsie cuz we couldn’t find a bathroom in time.
by HumaneAnimal October 16, 2017
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when you poop in your undies on accident
Girl: That roller coaster was awesome I thought I was going to shit my pants! Wait... I did crap my pants!

Friend: You just had a whoopsie poopsie! HHAAAHAHHAAA!
by slappy pappy dingus April 6, 2010
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(n.) one who has done a massive wet crap in their pants. Most of the time, the poop can be seen seeping through the underware, etc, and usually there is a horrendous odor associated with him/her.
\"Yo! Did u see that Poopsie pants over there?!?!? He was leaving a streak of messy poo when he walked past!\"
by Ghetto Nizzzik April 27, 2005
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The act of tossing your baby in the air and the baby shits all over you because they are scared.
Dad: "Honey! I was throwing the baby up and down when it shit on me!"

Mom: "Aw she is playing Poopsie Daisy with you!"
by bdamage October 6, 2010
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When your man is hitting it from behind at high speeds and thrusts his weenie in your asshole by accident
I honestly can't sit rn bevause my boyfriend did an oopsy poopsy last night
by Sonya235 July 4, 2017
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A chick who prefers "it" in the butt.
Tango: Yo yo Cash, ain't you worried dat you's 'a gonna git Monique pregnant?

Cash: Oh hells nah son! She's a poopsy momma. Quit askin' bitch-ass questions!

Tango: Cash, what about butt-babies?

Cash: Motha fucka! What'd I say?!
by Night Train April 15, 2008
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