Do you think this is mostly monsters? I hate making this fold but I also hate making this call, because experience tells me this is a not very smart guy who thinks he's being smart. No hand history but it went like this:

I am dealt in middle position, make a std 3x raise. Loose and fairly passive guy with stats of about 45/15/1.5 calls from the button, everyone else folds.

flop:
I lead for almost the pot, villain thinks a second and calls.

turn:
I lead for 3/4 pot, villain thinks... thinks... and min-raises.

Effective stacks are 100 BBs - but you don't really have to work the math. We both have enough behind that I can call his turn raise and we both still have more than the pot left.