Best line with the mortal nuts...

[TxRedMan]

tbh, I think his c/r is the only bet he's going to make when he's trying to shove you off a hand. i.e., when you re-raise, he's not going to fire again, so for those times it doesnt matter what you do. if you just called he's likely to shut down completely and when you raise he's insta mucking. but, when he has 77 here, sometimes you'll get his stack, but imho, only when you full pot 3 bet the flop. reason being b/c AKxx plays that way a lot of the time and as most of us know by now, when you flop an underfull in this spot the majority of the time you're going to be getting your money in as a slight favorite against a guy with big trips.

in sum, pot it back, hope he has 77, or is a crazy [censored] who'll 5 bet bluff you.