adj. 25B6; adjective COCKSURE, cocky, smug, conceited, self-assured, brash, blustering, overbearing, presumptuous, heading for a fall, riding for a fall; informal too big for one's boots.
OVERCONFIDENT
Meaning of OVERCONFIDENT in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012