Definition of hammy adjective from the Oxford Advanced American Dictionary

 

hammy

 adjective
adjective
NAmE//ˈhæmi//
 
(hammier, hammiest)(informal)
 
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(of a style of acting) artificial or exaggerated In the television ads, he cheerfully delivered some hammy lines before falling backward into a swimming pool.
See the Oxford Advanced Learner's Dictionary entry: hammy