bottom dollar meaning

• [American slang]
  n., v. phr., informal One's last penny, one's last dollar. He was down to his bottom dollar when he suddenly got the job offer.
  

• bet one's bottom dollar:    [American idiom]to ...
• bet one's bottom dollar on:     (informal) & ...
• i'll bet you my bottom dollar:    [American slang]in ...

Examples

1. i'll bet my bottom dollars that he will succeed.
2. i 'll bet my bottom dollars that he will succeed.
3. somebody will do it. i'll bet my bottom dollar on that.
4. dont bet your bottom dollar on it though
5. you can bet your bottom dollar he won't have waited for us