Pooping and vomiting at the same time. The vomiting is often done in an adjacent trash can, but when one is unavailable, the person has no choice but to de-throne and vomit in the dirty poo water toilet or else on the floor. Neither option is desirable, that's why people keep trash cans next to the toilet. Also known as taking a Lauren.
Last night was pretty rough, I just took a messy number 3. I need to brush my teeth.
by Agent Brian December 5, 2012
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When a woman has to go to the bathroom to change her tampon/pad, or "push out some blood."
Pull the car over honey, I need to use the bathroom. Number one or number 2. Neither, number 3- I need to change my tampon.
by wordelder June 23, 2011
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To ejaculate, both male and female, from an orgasm of the sexual kind.
Oh god, I just number 3'd all over my bed after that hot porn video
by Walter Schwartz March 21, 2015
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I ate some bad fish and had to go number 3 a couple hours later.
by Hot_Salsa November 14, 2010
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When you poo poo and pee at the same
aka every timea person poo-poos
"yes you're excused to the bathroom Johnny"-teacher
..5 minutes later
classmates-"ewww Johnny did you number one or two,"
"A number 3....
by Ass Hat3321 December 11, 2010
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Firing on all cylinders. Pooping, peeing, vomiting, expelling snot, shooting ear wax - all at the same time.

"What is it, number 1? Number 2?"
"No, worse. Number 3! Stand clear!"
by Pdg887 July 3, 2013
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