This is worth my whole stack, right?

[Poker879]

No I think this is an awful call, especially with the fact that he is a rock. No rock is going to push with a 9 high flush... at best, especially if he has any respect for you and the fact that you came in UTG. Even if he isn't a rock, most people who are going to push at all with a 9 high flush as opposed to calling it down are going to do it on the flop as opposed to giving a free card. I think this is a 100% fold... especially at a full ring game as opposed to short handed.