(colloquial) Alternative form of want to bet

Are you sure? Do you really think so? (as a skeptical rebuttal to a claim)

(gambling) A wager having a very poor expected return relative to the odds of winning.

(gambling) To lay bets of equal value against nearly all the horses in a race, so as to stand no great risk of losing.

Alternative form of bet a dollar to a doughnut

(idiomatic) To be absolutely sure of something; to be certain enough to wager an essential possession.

Synonym of bet a dollar to a doughnut

Alternative form of bet a dollar to a dime

Alternative form of bet a dollar to a doughnut

(figuratively, mildly humorous) To declare with confidence.