noun
overacting; hamming
Refers to exaggerated acting or gestures, often in a theatrical or comedic context. Loanword from English 'overaction'.
from English overaction
彼のオーバーアクションが観客を笑わせた。
His overacting made the audience laugh.
あの俳優はいつもオーバーアクションで、ちょっとわざと
That actor always overacts and seems a bit forced.