You bet your sweet patoot!

you (can) bet your (sweet) patoot

slang You can be absolutely certain that something will happen. Sometimes used ironically. ("Patoot" is a slang term for the buttocks.) You bet your sweet patoot I'm going to that concert—I've been saving up to buy a ticket for months now! Oh, you can bet your patoots that Kevin will be late tonight—he's never on time! I can't find my umbrella, so of course you can bet your patoot that it'll rain soon.
See also: bet, patoot
Farlex Dictionary of Idioms.

You bet your sweet patoot!

verb
See You bet your sweet patootie!
See also: bet, sweet
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • patoot
  • you (can) bet your (sweet) patoot
  • patootie
  • bippy
  • more like
  • more like (something)
  • none the worse (for something)
  • none the worse for
  • none the worse for something
  • seen worse