Omaha's not the aggressive, bluffing game that No-Limit Holdem is. But that doesn't mean you won't run into super-aggressive players in Omaha who try to bluff you off big pots.
As in Holdem, the only way to beat these players is to call those big bets when you think you have the best hand.
I've got $62 at a .10/.25 table, with a .5 ante, and I'm playing on Full Tilt. We're playing six-handed Pot-Limit Omaha Hi.
As you can see, it's been a good session, thanks to the wild player I'm referring to, a guy with $187 at a $25 Omaha table. You don't get that kind of a stack by playing tight, careful Omaha, unless you get an ungodly run of cards. This guy's been attacking every pot with unbridled enthusiasm, and when he hasn't won by betting people off hands, he's managed to suck out. If I sound a little bitter about it, he's done that to me too, until recently when I've finally managed to turn the tide.
OK, I've got 
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in middle position. I decide to call. This is not a bad hand to raise with, either, but my main target has re-raised and pushed the action as much as possible, and this not a hand I want to go to town with when I'm out of position.
The flop comes 
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. Not bad, really, but we are four-handed here, with two to act behind me, so I'm going to control the pot and check, since a pair, even an overpair, is rarely good here in Omaha. I don't really have a good draw either.
My opponent checks, and I check, and surprise, surprise, our aggressive friend bets $1.25, or the size of the pot.
Fortunately, the rest of my opponents fold, and so I'm heads up against my target, which is a perfect situation. Yes, I'm out of position, but this guy has bet crap all day, and I'm calling.
The 
hits the turn. Now I have a great flush draw to go with my overpair, and I decide to bet $2, about half the pot. I'm doing this to set my price for my hand, as I don't want him betting the pot. Plus it will help me determine his hand a little better. If he raises me, I can assume he actually has something (maybe) and just call.
He just calls, however, and that tells me I'm ahead because this guy has called with crap all day but raised with (some) good hands.
The 
hits the river. Crap. That's not a good card. I check to control the pot.
My wild opponent bets $4.
I'm going to call because he's taken advantage of scare cards all day long, and I didn't get heads up and wrapped up with a hand against an aggressive but weak opponent to fold on the river. Plus I really think I'm ahead. If that card gave him a straight on the river, I think he would have had it on the turn and raised me when I bet.
He flashes 
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for a pair of sixes, and I take a decent-sized pot of almost $16.
Understand that under normal circumstances, meaning a play against a normal, careful Omaha player, I would fold on the river. No way would my K-K be good there. But in this case my opponent is such a donkey that I honestly felt like I was good. Plus I've got a nice, big stack, and I didn't mind playing with it a little.
Now it's a little bigger, thanks to my opponent's wild, careless play, and my observations of it.