[Idiom] What does bet your bottom dollar mean?

johnnygergieos

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Aug 4, 2014
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Hi, UsingEnglish.

I just wanted to know what does "bet your bottom dollar" mean?

And please, can you give me an example.

Thank you.
 
Joined
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It means that something is very certain, so certain that you could bet all your money on it, even the last dollar in your wallet--the one on the bottom, underneath all the other dollar bills. ;)
 

BobK

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