a bid that is higher than preceding bids(bridge) a bid that is higher than your opponent's bid (especially when your partner has not bid at all and your bid exceeds the value of your hand)
同义词：overcall
v.
to bid for more tricks than one can expect to win,bid more than the object is worth
英汉双解大词典
overbid
1.
V（动词）
to bid for more tricks than one can expect to win 比能赢的投入更多的技巧 [bridge]
2.
N（名词）
a bid higher than someone else's bid 比其他人高的出价