WordWeb Online

1. Someone who deliberately behaves in such a way as to attract attention
   - exhibitionist, showboat [N. Amer]

1. Display proudly; act ostentatiously or pretentiously
   "he showed off his new sports car";
   - flaunt, flash, ostentate [archaic], swank, showboat [N. Amer], parade

Derived forms: showed off, shown off, show-offs, shows off, showing off

See also: show

Type of: display, egoist, egotist, exhibit, expose, swellhead [N. Amer]