Number 3 

Firing on all cylinders. Pooping, peeing, vomiting, expelling snot, shooting ear wax - all at the same time.

"Oof"

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

Number 3 by Pdg887 July 27, 2013

Number 3 

The Runs; Diarrhea; Squirts; The Trots; extremely foul, loose, runny bowel movement; watery extrecement

I thought I had to go number two but it turned out to be number 3

Number 3 by freeranger April 28, 2007

Number 3 

Meaning to spew. One of the primary bodily functions, follows on after Number 1 and Number 2. Polite way of saying you need to chuck.

Ben: Hurry up mate, I need to go to the bathroom!
Chris: What, #1 or #2?
Ben: Nah man, Number 3!! Let's GO

Number 3 by -Ryan- May 13, 2007

Number 3 

It's a rule on tiktok there's two though

"Number 3, man takes selfie with plane hijacker" and "Number 3, brown lady"

Number 3 by h0wsh0u1d1kn0w? February 3, 2021

number 3 

Pee and poop at the same time (1+2).

Hurry up in there! I gotta go number 3!

number 3 by reltihfloda April 25, 2022

Number 3 

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.

Number 3 by Dr. Wasinya October 9, 2009

Number 3 

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.

Number 3 by The King of Ping April 25, 2006