un·der·bid 
(ŭn′dər-bĭd)
(ŭn′dər-bĭd)v. un·der·bid, un·der·bid·ding, un·der·bids
v.tr.
1. To bid lower than (a competitor).
2. Games To bid less than the full value of (one's hand) in bridge.
v.intr.
To make an unnecessarily low bid.
under-bid′ n.
un′der·bidder n.