[xJMPx]

I know you don't want to tangle with another big stack, and I often play weak against them in the situation, but...

Here you have a guy that can afford to take shots at pots. He has just seen a ragged flop that is unlikely to have hit you and is only really worried about you having an overpair.

He actually has the advantage of acting first here with this flop, and there is a good chance he is just trying to exploit this.

I think I would re-raise here, if he calls/raises you are done with this hand unless the turn hits you. Even though he is the only guy that can stack you, he won't here because you missed this flop just like he probably did.