Anything thing that can be addictive like a song, a game or an activity.
"Yo you heard that new song from Jay-Z?"
"Yeah that shit is CRACK"

"What you doing?"
"I'm playing Halo 3"
"Word. Halo is CRACK"
by MAK MAN April 04, 2008
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the true slang meaing comes from New Yorks Dipset which refers to their music as being crack which is a very addictive drug of course
by K!ng $parrow™ March 07, 2007
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A smokable form of cocaine which is really cheap and gets you really high.
I got them crack rocks, five dolla, five dolla!
by Mike C! April 30, 2007
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A mixture of Cocaine and baking soda that people think is funny to add into conversation when it's really not.

Adding the word "crack" to any non crack related situation is NOT FUNNY.
Person One: Dude, I just tripped over my cat.
Person Two: What are you on crack?
Person One: That isn't funny, you're an asshole.
by Ilya (Kkemepobo) December 23, 2005
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1. whats going on.

2. to joke.

3. the atmosphere

4. for the sake of it

(all used mainly in UK)
1. whats the crack ere then?

2. he's funny..can crack a joke or two like

3. aii...went to that party last night..was a good crack!

4. ohh lets just go for the crack!
by northern-bird November 10, 2006
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Crack has two definitions (that you want to know about:-). The first definition of Crack is the drug, which puts our body and mind into an emotional high. When the drugs wear off the crack then puts our bodies into a negative emotion, therefore making the stoner want more.

The second definition of a crack is a specialized software or patch that modifies another software (or game, etc) so it can perform illegal functions that is not allowed or prohibited by the rightful publisher. A crack/patch can modify a trial version game and convert it to the actually full game. Any programmers who develop cracks and give them to the public can programme a crack to extend or unlock a executable file without having to buy it.
SloppyJoe: I downloaded trial version of CSS dude, and cracked it.

Janice: OMG, i bought it the other day.

SloppyJoe: sux0r.
by Kyaa! July 30, 2006
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