Simple past tense and past participle of ham.(verb)
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Use "hammed" in a sentence
"He hammed it up for the cameras, appearing on the front page of some newspapers, with scant regard for the families whose lives were altered forever by the struggle to reclaim the British outpost from the"
"The rest of the cast (including Elias, whom I like normally) sucked green eggs and hammed it up like the subject was a bad joke."
"Like all loveable teams, Oldham did not take themselves too seriously, as Holden and Rhodes showed when they hammed it up for an Alas Smith and Jones homage."