bet one's bottom dollar

verb

To be absolutely sure of something; to be certain enough of something to wager everything.

“Near-synonyms: bet a dollar to a doughnut, bet one's boots, make book”

Similar
bet one's lifebet the farmstake one's lifebet a dollar to a doughnutbet one's bootsmake book
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Meanings

verbbet one's bottom dollar (third-person singular simple present bets one's bottom dollar, present participle betting one's bottom dollar, simple past and past participle bet one's bottom dollar)

present singular third person bets one's bottom dollar · participle present betting one's bottom dollar

  1. idiomaticslangTo be absolutely sure of something; to be certain enough of something to wager everything.

    Near-synonyms: bet a dollar to a doughnut, bet one's boots, make book

    3 more examples

    He talks about it a lot, but I would bet my bottom dollar that he has never actually been there.

    But I’ll bet my bottom dollar that you’re wrong.

    1923, Agatha Christie, The Murder on the Links

    The sun'll come out Tomorrow Bet your bottom dollar That tomorrow There'll be sun!

    1977, “Tomorrow”, in Martin Charnin (lyrics), Annie

    Synonyms: bet one's life, bet the farm, stake one's life, bet a dollar to a doughnut, bet one's boots, make book

Synonyms & antonyms

verbTo be absolutely sure of something; to be certain enough of something to wager everything.

Similar
bet one's lifebet the farmstake one's lifebet a dollar to a doughnutbet one's bootsmake book
Also see
a pound to a pennybet a dollar to a doughnutbet one's bootsbet the farmmake bookstake one's life
Cite this entry
APA

bet one's bottom dollar. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/bet%20one's%20bottom%20dollar

MLA

“bet one's bottom dollar.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/bet%20one's%20bottom%20dollar. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “bet one's bottom dollar,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/bet%20one's%20bottom%20dollar.

Source: bet one's bottom dollar on Wiktionary, CC BY-SA 4.0.