crack
     adj : of the highest quality; "an ace reporter"; "a crack shot";
           "a first-rate golfer"; "a super party"; "played
           top-notch tennis"; "an athlete in tiptop condition";
           "she is absolutely tops" [syn: {ace}, {A-one}, {first-rate},
            {super}, {tiptop}, {topnotch}, {tops(p)}]
     n 1: a long narrow opening [syn: {cleft}, {crevice}, {fissure}, {scissure}]
     2: a narrow opening; "he opened the window a crack" [syn: {gap}]
     3: a long narrow depression in a surface [syn: {crevice}, {cranny},
         {fissure}, {chap}]
     4: a sudden sharp noise; "the crack of a whip"; "he heard the
        cracking of the ice"; "he can hear the snap of a twig"
        [syn: {cracking}, {snap}]
     5: a chance to do something; "he wanted a shot at the champion"
        [syn: {shot}]
     6: witty remark [syn: {wisecrack}, {sally}, {quip}]
     7: a blemish resulting from a break without complete separation
        of the parts; "there was a crack in the mirror"
     8: a purified and potent form of cocaine that is smoked rather
        than snorted [syn: {tornado}]
     9: a usually brief attempt; "he took a crack at it"; "I gave it
        a whirl" [syn: {fling}, {go}, {pass}, {whirl}, {offer}]
     10: the act of cracking something [syn: {fracture}, {cracking}]
     v 1: become fractured; break or crack on the surface only; "The
          glass cracked when it was heated" [syn: {check}, {break}]
     2: make a very sharp explosive sound; "His gun cracked"
     3: make a sharp sound; "his fingers snapped" [syn: {snap}]
     4: hit forcefully; deal a hard blow, making a cracking noise;
        "The teacher cracked him across the face with a ruler"
     5: pass through (a barrier); "Registrations cracked through the
        30,000 mark in the county" [syn: {break through}]
     6: break partially but keep its integrity; "The glass cracked"
     7: break suddenly and abruptly, as under tension; "The rope
        snapped" [syn: {snap}]
     8: suffer a nervous breakdown [syn: {crack up}, {crock up}, {break
        up}, {collapse}]
     9: tell spontaneously; "crack a joke"
     10: cause to become cracked; "heat and light cracked the back of
         the leather chair"
     11: reduce (petroleum) to a simpler compound by cracking
     12: break into simpler molecules by means of heat; "The
         petroleum cracked"
Source: WordNet® 2.0

crack [warez d00dz] 1. v. To break into a system (compare {cracker}).
   2. v. Action of removing the copy protection from a commercial program.
   People who write cracks consider themselves challenged by the copy
   protection measures. They will often do it as much to show that they are
   smarter than the developer who designed the copy protection scheme than
   to actually copy the program. 3. n. A program, instructions or patch
   used to remove the copy protection of a program or to uncripple features
   from a demo/time limited program. 4. An {exploit}.


Source: The Jargon File