number 3 

To masturbate or jack off.

number 1 = taking a leak

number 2 = taking a dump

number 3 = spilling your seed

number 3 by chowman November 6, 2006

number 12 

slang for head, dome, oral sex, or pp in the mouth. Originates from mcdonald's and their #12 Dome piece chicken

Yo nigga i got number 12 all night long

number 12 by elmoslicer January 28, 2008

number 8

Following the bathroom rules, number 8 is to vomit, take a shit, urinate, and masturbate at the same time.

"Yo my boy Anthony is nasty he pulled a number 8 in my bathroom!"

number 8 by Eddie Y. October 29, 2007

number three 

ecstasy.

Due to a ranking of drugs. It's still in the works. All drugs have not been tried/ranked yet.

see number two

What are you doing tonight?
About to get me some of that number three.

What are they on right now?
They are hella number threed out!

number three by Urban Dictionary March 30, 2009

number three 

The act of masturbating into a toilet.

He said he was going to the restroom for a number three.

number three by mrhh69 May 13, 2015

Number 2.5 

When your standing there doing a piss and you feel a fart coming on but instead you shart yourself and now you have to sit down on the toilet to finish your shit whilst cleaning up the mess in your undies.

mate, why were you in the toilet so long?

I went in to do a piss and ended up cleaning myself up, bloody done a number 2.5 (two and a half)..

Number 2.5 by Wayne-Car May 12, 2017

number eleven

nickname for a kid with a permanent snotty nose

There's Jill, she's got number eleven on her top lip again.

number eleven by duvelx August 13, 2017