number 4 

According to American Dad, that's when you poop while holding hands.

My friend and I are off to do a number 4.

number 4 by mactastic2009 March 16, 2009

number 4 

Slang for heroin. AKA number four heroin. Its etymology refers to the last of a 4-step purification process in which heroin is purified into a white fluffy powder.

Aunt Hazel warned cousin Charley of the dangers of doing number 4.

number 4 by J town booga January 9, 2008

Number 4 

To ejaculate; to go number four means to ejaculate, whether from a penis or a vulva. To explain the structure; number one means to urinate, number two denotes defecation, number three refers to vomiting, and number four equates to ejaculation.

Mike: Holy shit! There's Nova!
Zack: Over there?
Mike: Oh fuck! I think I'm about to go number 4! I'll be right back!
Zack: Oh, ok then!
Nova: Hi Zack! Where's Mike, he was with you a minute ago, wasn't he?
Zack: Oh yeah, he just went number 4, that's all!

Number 4 by JustAnotherSickFuckOnUrbanDic February 6, 2022

number 4 

when 2 people take a shit at the same time while holding hands!

dude i gota take a number 2 u commin? we can make it a number 4

number 4 by gary shackleford March 18, 2009

Number 4 

When two friends defacate at the same time in a public restroom and hold hands under the stall.

James: Hey Steve is that you in the stall next to me?

Steve: Yeah man.

James: Are you taking a number 2?

Steve: You bet. Are you?

James: Yeah we should hold hands and take a number 4.

Steve: Omg Yeah!

Number 4 by Wannnabe55 May 21, 2009

number 4 

Urinating, clearing your bowels and masturbating in the same trip to the washroom. Also referred to as a piss, shit and a wack!

I was supposed to meet K Lo at the party in an hour, but I needed to make time for a number 4 — so I called her and said I'd meet her in 90 minutes.

number 4 by Phineas Taylor Barracus December 20, 2004

Number 4 

Vomit or throwing up or puking
Noun,

Me:I think I'm gonna go number 4! It smells so horrible!
Andy: do it in trash can!

Number 4 by Inugami98UwU June 30, 2020