Pain in the backside AJo hand

[Guy McSucker]

Party 5/10. Very loose passive kind of line-up.

I open raise AJo UTG. Two cold callers and the button 3-bets. Blinds call along as do I and the other two. So that's a big pot. Eighteen small bets preflop. The button 3-bet means business and I am almost certainly dominated.

Flop: A 7 4. It's checked to me.

So here's my question. Bet or check?

Guy.