Source : Webster's Revised Unabridged Dictionary (1913)

Bruiser \Bruis"er\, n.
   1. One who, or that which, bruises.

   2. A boxer; a pugilist. --R. Browning.

            Like a new bruiser on Broughtonic sand, Amid the
            lists our hero takes his stand.       --T. Warton.

   3. A concave tool used in grinding lenses or the speculums of
      telescopes. --Knight.

Source : WordNet®

bruiser
     n : a large and strong and heavyset man; "he was a bull of a
         man"; "a thick-skinned bruiser ready to give as good as
         he got" [syn: {bull}, {strapper}, {Samson}]