What's on your mug?

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

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

By mactastic2009

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.

By J town booga

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!

By JustAnotherSickFuckOnUrbanDic

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

By gary shackleford

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!

By Wannnabe55