Number three 

Mixture of pee and poop - diharreah.

Number one - Pee
Number two - Poop
Number three - Diharreah

Number three by holymoley222 December 22, 2013

Number One Stunna 

a person that stuns at everything they do and is number one at it; ballin

Eric C. is da number one stunna.

Number One Stunna by Soehlman September 24, 2008

Number Three 

When you have extremely bad diarrhea or thin watery feces. It is often the cause of spicy food and Taco Bell.

"Hey, can we go I have to pee...?"
"Dude, don't be a fag, go in the trees."
"...from my ass."
(Number Three)

Number Three by nirog January 4, 2009

Number 6 

A stunning blonde who plays several key roles in Cylon society. She is the first humanoid Cylon that viewers witness in the re-imagined Battlestar Galactica. She is portrayed by actress/model Tricia Helfer.

See that blonde over there? She could be my Number 6!

Number 6 by Jason Bayer August 4, 2007

Number 1.5 

To extrete diarrhea or runny shit.

<me> Can I use your toilet sir?
<you> You gonna do a Number 1 or Number 2?
<me> I gotta do a Number 1.5!!!
<you> Find another toilet!

Number 1.5 by terminator March 10, 2004

Number 3 

Getting Freaky Down There.
Slow And Steady.

Yeah yesterday she was doing number 3..

Number 3 by Eddie May 25, 2006

Number blind 

Slang for the math learning disability dyscalculia

My dyscalculia is making me all number blind

Number blind by ellyodd April 15, 2010