The difference between Ham it up and Overact
When used as verbs, ham it up means to deliberately exaggerate one's emotions or movements, or to overact or act badly, whereas overact means to act in an exaggerated manner.
check bellow for the other definitions of Ham it up and Overact
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Ham it up as a verb (idiomatic, acting):
To deliberately exaggerate one's emotions or movements, or to overact or act badly.
Examples:
"You can count on him to ham it up for the camera."
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Overact as a verb (acting):
To act in an exaggerated manner.
Examples:
"He overacted his part."
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Overact as a verb (obsolete, transitive):
To act upon, or influence, unduly.