as sure as hell

(as) sure as hell

Certainly, definitely, or absolutely. I've worked all my life to get to this position, so I'm sure as hell not going to give it up without a fight! They're sure as hell going to notice all that money missing in the morning.
See also: hell, sure

(as) sure as hell

mod. absolutely certain. I’m sure as hell he’s the one.
See also: hell, sure