BRASH Meaning of BRASH in English adj. 1 vulgarly or ostentatiously self-assertive. 2 hasty, rash. 3 impudent. brashly adv. brashness n.[ orig. dial., perh. f. RASH(1) ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012