Found 2 items, similar to ham it up.
English → English (WordNet) Definition: ham it up ham it up v : exaggerate one's acting [syn: overact, ham, overplay] [ant: underact]
English → English (gcide) Definition: ham it up Ham \Ham\ (h[a^]m), v. i. (Theater) To act with exaggerated voice and gestures; to overact. [PJC] ham it up to act in a showy fashion or to act so as to attract attention; to ham. [Colloq.] [PJC]