Source : Webster's Revised Unabridged Dictionary (1913)

Skipjack \Skip"jack`\, n.
   1. An upstart. [Obs.] --Ford.

   2. (Zo["o]l.) An elater; a snap bug, or snapping beetle.

   3. (Zo["o]l.) A name given to several kinds of a fish, as the
      common bluefish, the alewife, the bonito, the butterfish,
      the cutlass fish, the jurel, the leather jacket, the
      runner, the saurel, the saury, the threadfish, etc.

   4. (Naut.) A shallow sailboat with a rectilinear or V-shaped
      cross section.

Source : WordNet®

skipjack
     n 1: oceanic schooling tuna of considerable value in Pacific but
          less in Atlantic; reaches 75 pounds; very similar to if
          not the same as oceanic bonito [syn: {skipjack tuna}, {Euthynnus
          pelamis}]
     2: medium-sized tuna-like food fish of warm Atlantic and
        Pacific waters; less valued than tuna [syn: {Atlantic
        bonito}, {Sarda sarda}]
     3: able to right itself when on its back by flipping into the
        air with a clicking sound [syn: {click beetle}, {snapping
        beetle}]

Source : Free On-Line Dictionary of Computing

SkipJack
     
         An {encryption} {algorithm} created by the NSA
        (National Security Agency) which encrypts 64-bit blocks of
        data with an 80-bit key.  It is used in the {Clipper} chip, a
        {VLSI} device with an {ARM} processor core, which is intended
        to perform cryptographic operations while allowing the
        security agencies listen in.
     
        There are (apparently) two agencies, both of whom have to
        agree that there is a valid reason to decode a message.  Don't
        laugh, they are serious.
     
        [Algorithm?]
     
        (1995-12-07)