ass crack of dawn 

Redonkulously early in the morning. Often it is still dark out. Commonly used when one must wake up early after a night of drinking, or getting up to go on a trip. Also can be referred to "Oh dark hundred"

Person 1: "Dude, what time do we have to get up tomorrow?"
Person 2: "The freaking ass crack of dawn."

ass crack of dawn by K.Spence June 11, 2006

Plumber's Crack 

the but crack that is visible when one is either crouching or sitting resembling a plumber fixing a toilet. Usually causes one to be grossed out unless your into that kind of stuff.

Steve-"Dude I'm about to puke from looking at that girls plumber's crack"
Josh-"I know man it's disgusting!"
Steve+Josh-"Pull up your pants!"

Plumber's Crack by BSTN STEVE June 10, 2009

Back Sack'n'Crack 

Three words defining the hair removal procedures involved in hair salons of a male from the areas of the carpet back, ballsack and butt crack.

Usually coupled with a hairless jock area.

'You're a fucking hairy cunt'
'No way dude, I'm off on a jolly this weekend at a health spa. As part of the package I'm getting the 'ole back sack'n'crack'
'I hear that'

Back Sack'n'Crack by Krikpoh Kneebracket January 28, 2007

Radioactive Crack Monkey 

A man who is acting extremely hyper and social, though they are usually calm and detached.

I say, Tom sure is being one hell of a radioactive crack monkey today.

Radioactive Crack Monkey by Porkman385 November 27, 2006

cotton ass crack 

Cotton Ass Crack or more commonly refered to as a crusty asshole is when, like cod mouth, your asshole becomes dry and skin starts to peel resulting in a burning and itching sensation on and around the asshole.

Dammit Ronda, get your lazy fat ass over here. My COTTON ASS CRACK itches like a mother-fucker and its peeling all over the damn couch.

cotton ass crack by NICMOZ May 27, 2008

Brain Crack 

When you have an idea and need to get out as fast as you can, because otherwise your brain becomes addicted to the idea of ideas.

A term created by the YouTube people Vlogbrothers.

When you think "My idea is so important that I have to keep it in my head till I can execute it perfectly" and get this brain crack idea out.

Brain Crack by secretsuperperson April 17, 2009

video crack 

Video Poker. A game you play for money that is very addicting.

I played some video crack and lost $250

video crack by Richard Long April 12, 2003