camp it up, go ham, act out, ham up, play up, act up, hammock, camp, monkey around, come it, more...

underplay, downplay, restrain, be modest

overact, emote, more...

be theatrical,   exaggerate onstage,   behave theatrically,   act cute,   plays the ham,   exaggerate on stage,   be dramatic,   over act,   overdo it on stage,   act dramatically