1. a conspicuous success

e.g. 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

Synonym: hitsmashstrikebang

2. a very attractive or seductive looking woman

Synonym: stunnerknockoutbeautyravishersweetheartpeachlululookermantrapdish

3. a person who smashes something