Usage examples (4)

• A fine British cast overact or underact in this perfunctory true-life tale of a working-class lad from a sink estate in south London.
• I spent my youth anesthetizing myself just enough to stand the daily less-violent silent injustices, and I think it means I tend to underact when the hatred is more open.
• In fact, he suggested political leaders were better to "overact" than "underact" when it comes to speeding stimulus money out the door.
• She doesn't overact or underact; she just stands around with whatever the appropriate expression for the scene seems to be on her sweet, pretty, childlike face.