WordWeb Online

1. (used colloquially) overly conceited or arrogant
   "a snotty little scion of a degenerate family";
   - bigheaded, persnickety, snooty [informal], snot-nosed [informal], stuck-up [informal], too big for one's breeches [informal], uppish [informal], snobbish
    
2. Dirty with nasal discharge
   "a snotty nose";
   - snot-nosed [informal]

Derived forms: snottiest, snottier

See also: dirty, proud, soiled, toffee-nosed [Brit, informal], unclean

Encyclopedia: Snotty