crack·er /ˈkrækɚ/
 破解專家,黑客,(指懷有惡意的人在未獲授權的情況下,企圖侵入計算機系統內的行為);餅乾,爆竹,胡桃鉗
 Crack·er n.
 1. One who, or that which, cracks.
 2. A noisy boaster; a swaggering fellow. [Obs.]
    What cracker is this same that deafs our ears?   --Shak.
 3. A small firework, consisting of a little powder inclosed in a thick paper cylinder with a fuse, and exploding with a sharp noise; -- usually called firecracker.
 4. A thin, dry biscuit, often hard or crisp; as, a Boston cracker; a Graham cracker; a soda cracker; an oyster cracker.
 5. A nickname to designate a poor white in some parts of the Southern United States.
 6. Zool. The pintail duck.
 7. pl. Mach. A pair of fluted rolls for grinding caoutchouc.
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 cracker
      n 1: a thin crisp wafer made or flour and water with or without
           leavening and shortening; unsweetened or semisweet
      2: a poor white person in the southern United States [syn: redneck]
      3: a programmer who `cracks' (gains unauthorized access to)
         computers, typically to do malicious things; "crackers are
         often mistakenly called hackers"
      4: firework consisting of a small explosive charge and fuse in
         a heavy paper casing [syn: firecracker, banger]
      5: a party favor consisting of a paper roll (usually containing
         candy or a small favor) that pops when pulled at both ends
         [syn: snapper, cracker bonbon]