bet your bottom dollar
非常確信;非常相信某事
口語·表示絕對肯定
英文釋義
to be absolutely certain or confident about something; to be willing to wager everything one has on a particular outcome
例句
You can bet your bottom dollar that she'll win the competition.
典故來源
與bet bottom dollar相同,強調用最后一點錢打賭,表示絕對自信。