RichThesaurus
bet dollars to doughnuts
vs
bet one's bottom dollar
bet dollars to doughnuts
bet one's bottom dollar
verb
To be absolutely sure of something; to be certain enough of something to wager everything.
How often have the words
bet dollars to doughnuts
and
bet one's bottom dollar
occurred in a corpus of books?
(source:
Google Ngram Viewer
)