Overconfident

Adjective

 * 1) too confident.
 * 2) presumptuous, cocksure, rude and disrespectful.

Thesaurus
arrogant, assured, audacious, brash, brazen, brazenfaced, cocksure, cocky, confident, convinced, decided, determined, foolhardy, hasty, heedless, hubristic, improvident, imprudent, impudent, incautious, indiscreet, injudicious, insolent, overbearing, overbold, overcareless, oversure, overweening, persuaded, poised, pompous, positive, presuming, proud, pushful, pushy, rash, reassured, secure, self-assertive, self-assured, self-confident, self-important, self-reliant, short-sighted, sure, swaggering, temerarious, thoughtless, unafraid, unchary, undoubting, unfaltering, unhesitating, unwary, unwavering, uppity, vainglorious