rouser n. + Add to list US //ˈɹaʊzɝ// UK //ɹˈaʊsɐ// rous·er Archaic Informal SynonymsEtymology Synonyms arouserwakerOrigin From rouse + -er. Idioms1 entry01rabble rouserSomeone or something that tends to inspire mobs; something controversial or provocative.