Are you on crack? 

1. The actions/words you just displayed are unbelievable!

2. You're not your normal self, Jim.

Why are you laughing so much? Are you on crack?
OR
Stop vomitting... are you on crack?

Are you on crack? by fallacy October 30, 2001

Jack In a Crack 

Jack In The Box- A fast food restaraunt.

Man. I'm hunry! Let's eat at Jack In a Crack.

Jack In a Crack by gundamNIT January 15, 2003

kitty crack 

another name for catnip. though crack may not exactly be the best drug to describe catnip, "kitty crack" has a better ring to it than "kitty pot" or "kitty acid", yes?

Oreo's acting crazy again...must've gotten into that kitty crack.

kitty crack by vivelerockk07 April 8, 2008

cactus crack

Beginning with a case of untreated swamp ass, it's when chaffing and burning occurs on the rim of the anus.

"Hello Dan."
"Hi Harris."
"Why the sour face?"
"You see Harris, I have an atrocious case of cactus crack."
"MMMMMM"

cactus crack by CCrack July 24, 2006

I'll give it a crack

Australian Slang. Means the person will try their best.

John: "Jim do you think you could assist me with putting together this wardrobe?"
Jim: "I'll give it a crack!"

I'll give it a crack by Unquenchable February 23, 2017

Call of duty crack ops 

Another name for the new call of duty game which with its multiplayer is highly addictive. If you let it hook you in, you will forgo nature to play it. it is not the best game ever made by any stretch of the imagination but when playing multiplayer you will become an addict. like taking lots of crack will make you addicted. I doubt NASA devoted more time to the space program than gamers have to this game. do not let it hook you in, leaving play for a few hours will cause withdrawal symptoms. if the government wants a way to keep people in check look no further

Tom: fancy some crack
Dick: no thanks I have call of duty crack ops
Tom:ooo nice
Dick/Tom: now we have no life

Call of duty crack ops by Marcus Antonio November 21, 2010

Bum Crack 

To un-intentionally show you bum. Usually only the top part is revealed when bending down. Or if you’re a builder of some description you will already be wearing loosely fitting pants that assist in revealing your bum crack.

I was walking along the street when I saw two moons looking at me. The fattest builder was showing every one his bum crack. To which I shouted out say no to crack!

Bum Crack by Harpo July 20, 2004