verb (used with object), un·der·bid, un·der·bid·ding. to bid less than (another bid) or less than the bid of (another bidder), especially in seeking a contract to be awarded to the lowest bid or bidder; make an offer at a lower price than. Cards. to bid less than the value or worth of (a contract or hand).

What are underbidders?

underbidder in American English

(ˈʌndərˌbɪdər ) 1. one that underbids. 2. the bidder that has made the second-highest bid in an auction.

What does it mean to be under bid?

transitive verb. 1 : to bid less than (a competing bidder) 2 : to bid (a hand of cards) at less than the strength of the hand warrants.