That's for dang sure!

that's for dang sure

That is absolutely certain; that's the truth. "Dang" "Dang" is a milder substitute for "damn." We'll have our work cut out for us, that's for dang sure! A: "I'm sorry, boss. It won't happen again." B: "Well that's for dang sure, otherwise you're fired!"
See also: dang, sure
Farlex Dictionary of Idioms.

That's for dang sure!

Rur. That is quite certain! (The formulaic response to That's for sure!. The accent is always on the dang.) Tom: That's for sure! Jane: That's for dang sure! Sally: We'll be there and that's for sure! Bill: Yup! That's for dang sure!
See also: dang
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • that's for dang sure
  • dang sure
  • that's for damn sure
  • that's for danged sure
  • that's for damned sure
  • that's more like it
  • that's just it
  • that's all
  • that's right
  • that's the stuff