Sack Whack on the Back Crack 

The act of thrusting the man junk so far into a woman's (or man's if you are homosexual) anus multiple times that the balls consistently slap against the "host's" butt cheeks making a sound like a great high five.

KirtKanReed: "i am soo hungover bro, i can't remember anything about last night."

ChadKant: "you wouldn't want to."

Zenovia's Playa: " YEAH! BECAUSE CHAD GAVE YOU THE sack whack on the back crack WHILE YOU WERE SHIT FACED DRUNK LAST NIGHT AND PASSED OUT ON THE COUCH!"

Sack Whack on the Back Crack by Zenovia's Playa June 14, 2009

butt crack 

amphetamine that tastes of ass

Guy #1: Hey, where does this butt crack come from?
Guy #2: I had to hide it somewhere safe
Guy #1: Dude naw!

butt crack by Firetruck_abbrevated March 16, 2011

Birth Crack 

A Slang word for a womans vagina.

Damn I'd like to get up in that birth crack!

Birth Crack by Travis B December 14, 2008

Pimp Crack 

When you Have you car windows tinted and you roll them down to where the point closest the the mirrors meets the window so you can let your music out and get air but people cant see you.

"I roll with a pimp crack" "pimp crack!!!!"

Pimp Crack by Jayimc December 14, 2008

let's get crack'n 

let's get things started

C'mon, what are we waiting for? Let's get crack'n

let's get crack'n by $ally August 4, 2007

ass crack juice 

After an intimate session of woman on top, her cum that makes its way down into a guys ass crack- reacting with his ass juice(sweat) to create an awful stench.

You'll need more than a casual shower to get rid of that ass crack juice.

ass crack juice by todd h November 30, 2006

on crack

if something is mad, bad or just plain wrong, it can be described as "on crack", or, for added emphasis, "so on crack".

george bush is so on crack.

on crack by robert June 16, 2003