something really good, pretty much addicting

1. freebase form of cocaine, generally smoked in a crackpipe

2. the crevice between one's butt cheeks.

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.

A small, illegal program who's sole purpose is to trick another program (by editting, imputting a registration key, or some other method) into thinking it has been registered.

The area between the ass cheeks and, in females, including the crevices of the genitalia.

Use this word when describing something good or well-done.

In computers, a program that modifies the code of another in order to bypass copy protection techniques. Cracks are often applied to trial programs or programs requiring product activation.