Countering a ultra-loose passive slowplayer?

What do I do vs someone like this? I recently played a person like this in a casino. When my hand is very strong it's very easy to trap this person. But when my hand is less clear-cut I never know quite where I stand.

Let's say I raise in late position with A-Q of hearts. The flop comes down A 5 6 with two spades. He checks, I bet the pot, everyone else folds, he calls. The turn comes an 8. He checks again. What do I do here? Do I bet my top pair again?

Probably he has something dumb, like A-3, but he could also have A-6, A-5, a set, a flush draw, a straight draw. He isn't quite a complete calling card- he is somewhat capable of folding. He will have either some kind of draw, or he will have a hand. He could even be slowplaying a KK or AA, this is exactly what he does, I saw it twice. But it's so difficult to define his hand because he doesn't raise, and he does sometimes make poor chases.

So in this situation, should I just value bet everything, and not worry if he is slowplaying a bigger hand since he's never going to shove me all in? How then do I take all his chips? What would you do?

Well he sounds like a good player if he is able to fool everyone so well. Maybe attempt to counter him with his own medicine. Slow playing a few hands and putting some doubt into his mind. Bet low on unsure hands until the river. If he beats you, you won't lose too much, but if you beat him you win something and you get to see more of how he plays.

control the pot better if you dont know where you are.

find his limit of calling. how high is a bet worth for him to call.
Watch his action against others. Does he do it against loose players, or tight. does he play alot of hands? howmany times does he win a showdown.

try to analyse it closely, but don't focus too much on getting his/her money. there are usually easier targets
the more someone like that is ignore the wreckless he will be(come).
and let him beat a couple of your (cheap) bluffs or potsteals.
the next time you do have a hand, he'll be more willing to call and loose more money.

but once again, the best way is not to go after one person coz he irritates you...

if it were me id only play a solid hand against him until i had more of an idea of how he plays.

jenkins- Nah he was not a good player. I saw him lose a lot of money: he would have a hand, not bet it, and let the other person suck out. I thought about slowplaying myself, except he doesn't bet, so we just check to the river. lol.

iamxnl- To give you an idea, in our 1/2 NL 10-player ringgame, a tight player in early position opened a pot with a $7 raise, I re-raised to $15 in middle position - and our friend Loosey Goosey calls on the button with K2 suited. Seeing his hand in the showdown (he won with a pair of kings, the tight player having missed a flush draw and me folding on the flop) was a little upsetting.

So he's calling with any suited ace or king, any connector suited at not, and who knows what else. Calling raises and reraises to see the flop. I mean this is such a mistake, he seems like a valid target to me.

Next time I see someone like that, I will try setting him up a bit as you suggest, and watch him closer to find his calling limit. His play didn't irrititate me, -- rather it was inspiring, I saw him lose so much money. But it was never from getting targeted or trapped, it was always some other weak player unintentionally sucking out.