Source : Webster's Revised Unabridged Dictionary (1913)

Smasher \Smash"er\ (-[~e]r), n.
   1. One who, or that which, smashes or breaks things to
      pieces.

   2. Anything very large or extraordinary. [Slang]

   3. One who passes counterfeit coin. [Cant, Eng.]

Source : WordNet®

smasher
     n 1: a person who smashes something
     2: a very attractive or seductive looking woman [syn: {stunner},
         {knockout}, {beauty}, {ravisher}, {sweetheart}, {peach},
        {lulu}, {looker}, {mantrap}, {dish}]
     3: a conspicuous success; "that song was his first hit and
        marked the beginning of his career"; "that new Broadway
        show is a real smasher"; "the party went with a bang"
        [syn: {hit}, {smash}, {strike}, {bang}]