sizzler sizzler /ˈsɪzlər/

noun

1. [Informal] A conspicuous success  ( bang [Informal] , smash , smasher [Informal] , hit , strike , sizzler [Informal] )
   a conspicuous success
    That song was his first hit and marked the beginning of his career
   that song was his first hit and marked the beginning of his career
    That new Broadway show is a real smasher
   that new Broadway show is a real smasher
    The party went with a bang
   the party went with a bang
   
2. [Informal] An extremely hot day  ( scorcher , sizzler [Informal] )
   an extremely hot day