bet one's bottom dollar

English

Pronunciation

Audio (AU) (file)

Verb

bet one 's bottom dollar

(idiomatic) To be absolutely sure of something; to be certain enough of something to wager everything.
He talks about it a lot, but I would bet my bottom dollar that he has never actually been there.

Synonyms

bet a dollar to a doughnut, bet one's boots, bet the farm

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