OVERACT
overact, ham it up, ham, overplay
(verb) exaggerate oneโs acting
Source: WordNet® 3.1
Etymology
Verb
overact (third-person singular simple present overacts, present participle overacting, simple past and past participle overacted)
(acting) To act in an exaggerated manner.
(obsolete, transitive) To act upon, or influence, unduly.
Synonyms
• chew the scenery, ham, ham it up, melodramatize, tear a cat
Source: Wiktionary
O`ver*act", v. t.
1. To act or perform to excess; to exaggerate in acting; as, he
overacted his part.
2. To act upon, or influence, unduly. [Obs.]
The hope of inheritance overacts them. Milton.
O`ver*act", v. i.
Definition: To act more than is necessary; to go to excess in action. B.
Jonson.
Source: Webster’s Unabridged Dictionary 1913 Edition