adjective used to describe something that only a person high on crack could imagine/come up with/create
That test was crackful!
by Gretchen Prythine February 25, 2008
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Otherwise known as crack-cocaine, this illegal drug is a mixture of two parts cocaine and one part baking soda. This chemical process reverts the powder-cocaine mkaing process by one step, producing a smokable form of the naturally found alkaloid cocaine. Because of its nature as an inhalable substance, the high is quicker and more intense, leading to a larger number of addicts. In present society, it is considered to be much more distasteful to use crack-cocaine then powder-cocaine as crack is mainly viewed as a drug for poor people whereas powder cocaine is used by a richer constituancy. Contrary to popular belief, crack-cocaine is not freebase cocaine. Freebase cocaine is a mixture of cocaine, ether, and other dangerous and combustable materials. Baking soda was replaced as the ingredient in the 1980's to make production easier and less dangerous. Either way, crack and freebase cocaine produce the same smokable form of the drug.
crack-cocaine is usually found in poor black neighborhoods in the ghetto whereas powder-cocaine is found in rich white suburban neighborhoods.
by nego December 6, 2005
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1. Smokeable cocain
2. A program to unlock trial versions of programs
3. "butt cleavage"
1. Avoid crack addicts
2. I downloaded a crack today. No way was I paying 200 bucks for that program!
3. When the plumber bends down you can see his crack.
by Raych December 28, 2005
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Basically, crack is silly, intentionally non-serious, and has a high tendency to be extremely crazy and unfounded, such as purposeful OOC-ness or playing on cliches, inside jokes, and/or fanon.

The term crack probably stems from crack as in crack cocaine, as opposed to a crack in a wall. As in, so horrendously unfounded/silly that only one could have come up with it while under the influence of crack.
Ed/Roze and Kagome/Kohaku are my secret crack pairings in the Fullmetal Alchemist and Inuyasha fandom.

Kagome/Sake, Inuyasha/Tessaiga, Inuyasha/Kagome's Seiraa Fuku, Shinidamachuu/Kikyou, Naraku/Kikyou's Ashes, and Jakotsu/Hairpin are also crack pairings - these are all from Inuyasha as well.
by Numisma August 13, 2005
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a now obsolete adjective popular as a business buzzword among yuppies in the early eighties. It described a worker who was very smart and very fast-paced.

This meaning of "crack" was forced out by the drug, crack, in the mid-eighties. Sort of like you can't say "gay" to mean "happy" anymore.
That was a good move to hire him; he's crack.
by Dr. Heywood R. Floyd May 20, 2007
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Removing copyright protection from copyrighted software. Commonly used to obtain software without paying for it. Cracking is not by inserting a false or used serial number, but to insert other documents and files into the actual program to make it seem like it was registered by a paying customer, when it actually wasn't.
My friend downloaded Microsoft Word, and is cracking it right now.
by Umbepo July 17, 2005
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