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When a man or woman ejaculates. Number one is pissing, Number two is taking a shit, so Number 3 would be ejaculating.
The guy was so hot I almost Number 3'd in my panties.
by Dr. Wasinya October 09, 2009
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23
Basically when you've got diahhrea. It's a combination of a number 1 and a number 2. So when you piss out of your ass you can politely refer to it as a number 3.
I had some really good mexican food last night but it left me with the number 3s all morning.
by The King of Ping April 08, 2006
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24
When you go to the bathroom to pleasure yourself. You're not going number 1 or number 2.
"You ate too many oysters at lunch and began running hot, so you went to the bathroom to go number 3."
by Mr. Account Manager February 19, 2010
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25
Having diahrrea or the action of urinating and passing a bowel movement at the same time.
Gretta: "I have to go the bathroom real bad!"
Marla: "Is it #1 or #2?"
Gretta: "Its worse! I feel a #3 comin' on!"
by gretta March 21, 2005
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27
Restroom term for diarrhea. If number one is urinate and number two is defecate than number 3 is both at the same time.

Pissing out your butt.

Hershey squirts.
I had number 3 all morning after a night of drinking draft beer!
by Max Pontiac December 20, 2006
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28
noun - semen
verb - to ejaculate

Often used in the context that one would use the phrase "number 1" or "number 2" to describe bodily functions or fluids."
"Dude, I just took the biggest number 3 all over my ex-girlfriends bed."
by Fob Star November 03, 2009
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