ROUST Meaning of ROUST in English v.tr. 1 (often foll. by up, out) a rouse, stir up. b root out. 2 US sl. jostle, harass, rough up. roust around rummage. [ perh. alt. of ROUSE ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012