(Adj.): Synonym for the slang use of "crazy"; wild, entertaining; of a nature that is indescribably cutting-edge
"That Cirque du Soleil show was absolutely crack!" "Yah. It was pretty crazy. Now Miles Davis's "Bitches Brew"--this jazz is crack, all over the place.
By Nietzschehope
Crack is something that is sold by both drug dealers and prostitutes. The only difference is that a prostitute can wash her crack and sell it again.
"I stuffed some crack up her crack.
By Sarcastro
crack cocain, a white drug substance that fucks you up.
crack... drywall dust... what's the difference?
By Vw4Life
Late 80s and 90s. To make fun of someone or something.
He likes to crack on people who wear high-waters. He was gettin' cracked on in class. They were cracking on her giant nose.
By Sultan Yaacoub
Something you should never step on when you're walking on a sidewalk or else you'll break your mother's back.
7 yr old: "I dare you to step on that crack!" Other 7 yr old: "Nah, I don't wanna[ [break my mom's back."
By xxylvii