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Urinating (number one) and defecating (number two) simultaneously.
Joe: Damn I got to go.
Jim: Number one or number two?
Joe: Both, bro'.. number three!
by Joe Bone March 08, 2005
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16
diarrhea. it is like a number one, but it is also like a number two. hence, number three.
Man, after that spicey chicken wing eating contest, I had flaming number three for like, two weeks.
by Dethbringer September 13, 2005
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17
Its diarrhea because it has the fluid of pee but it still is poop.
Male number 1: Yo man last night after dinner i had some bad number three it stinked up the whole bathroom.

Male Number 2:Damn man i never want to have a number 3
by malima August 19, 2014
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20
Using your mobile phone while sitting on the toilet, long after you've finished going number one or two.
Man, he's been in the bathroom forever. He must be going number three.
by marcobenvoglio June 16, 2016
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