WordWeb Online

1. Lively and humorously cheeky or forward
   "a certain pert gaiety and ease of manner";
   - impertinent, irreverent, saucy [informal], cheeky [Brit, informal]
    
2. Marked by up-to-dateness in dress and manners
   "a pert young man";
   - dapper, dashing, jaunty, natty [informal], raffish, rakish, spiffy [N. Amer, informal], snappy [informal], spruce

Derived forms: pertest, perter

See also: fashionable, hip [informal], spirited, stylish

Encyclopedia: Pert, Gary