Bet your bottom dollar
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What's the meaning of the phrase 'Bet your bottom dollar'?
Bet your last coin.
What's the origin of the phrase 'Bet your bottom dollar'?
Unsurprisingly, this in an American phrase. First cited in the La Crosse Independent Republican, September 1856:
"I'm goin' to vote for you [James Polk] - you can bet your bottom dollar on that!"