Source : Webster's Revised Unabridged Dictionary (1913)

Colt \Colt\ (?; 110), v. i.
   To frisk or frolic like a colt; to act licentiously or
   wantonly. [Obs.]

         They shook off their bridles and began to colt.
                                                  --Spenser.

Colt \Colt\ (?; 110), n. [OE. colt a young horse, ass, or camel,
   AS. colt; cf. dial. Sw. kullt a boy, lad.]
   1. The young of the equine genus or horse kind of animals; --
      sometimes distinctively applied to the male, filly being
      the female. Cf. {Foal}.

   Note: In sporting circles it is usual to reckon the age of
         colts from some arbitrary date, as from January 1, or
         May 1, next preceding the birth of the animal.

   2. A young, foolish fellow. --Shak.

   3. A short knotted rope formerly used as an instrument of
      punishment in the navy. --Ham. Nav. Encyc.

   {Colt's tooth}, an imperfect or superfluous tooth in young
      horses.

   {To cast one's colt's tooth}, to cease from youthful
      wantonness. ``Your colt's tooth is not cast yet.'' --Shak.

   {To have a colt's tooth}, to be wanton. --Chaucer.

Colt \Colt\, v. t.
   1. To horse; to get with young. --Shak.

   2. To befool. [Obs.] --Shak.

Source : WordNet®

colt
     n 1: a young male horse under the age of four
     2: a kind of revolver