"to emphasize (something) too much," 1933, a metaphor from card games, in to overplay (one's) hand, "to spoil one's hand by bidding in excess of its value" (1926), from over- + play (v.). Earlier (from 1819) in a theatrical sense, "act (a part) with an extravagant and unnatural manner." Middle English had overpleien in the sense of "to outplay, defeat." Related: Overplayed; overplaying.
overnice
overnight
overpark
overpass
overpay
overplay
overpopulate
overpopulation
overpower
overprice
overproduction