SB is 80 year old asian guy who I have never seen before. He is sitting on a $1400 stack but not sure how he got it. I don't know if he is a total fish but he is not solid as I have seen him limp call a raise and a reraise with A7o in early position.
He has been doing a lot of raising and check raising but not much has gone to showdown so I am not sure if he is spewing or running hot. I have seen him raise/shove on flop with a open ended straight flush draw for 200BB effective.

No history with Hero.
Hero $600 stack

Hero raises AJ to $20 after a few limpers in CO. Button calls. SB calls. 2 limpers call. We are going to the flop far more multiway then what I wanted.

Flop ($100)
J86

SB bets $60. Hero calls. everyone else folds.

Turn 3 ($220)
SB checks, Hero bets $120, SB insta raises to $300

These games play very loose passive. I know his line looks strong but most either slowplay the monsters or would just keep betting if they flopped a monster and took the flop betting lead especially when the backdoor clubs show up. This is a very unusual line.

Snap fold

Either we want to play our TPTK for 200bb in a loose-passive game or we want to fold the turn.

I want to fold the turn.

When he checks the turn and you decide to bet, are you betting for value or to get a fold? I assume it was for value, so then the question is did you bet with the intention of folding to a raise or calling and risking your stack with TPTK. With $220 already in the pot because of multi way preflop and donk on flop I'd be more inclined to check after SB checks. As played, I'm letting it go. Best case scenario I think you'd be lucky to be up against some combo draw with a lot of flush draws on the turn like QJc, JTc, T9c, maybe even 97c. Worst case you're against a set or two pair.

his line makes no sense.

if he has a set, he's not c/r the turn. it's just idiotic and it will check through far too often.

honestly, i'm thinking his line is very draw heavy with some TP+FD combos.

normally when an octogenarian c/r me, i'm pretty much auto-mucking with less than a set, but i kinda want to call here based on the description of being fairly active with raising. but then there is the inherent problem that we're not sure what cards are good for us and what are bad.

if we call the pot is ~820 and we're 220 behind, so i guess i just ship here, not very happy about it though.

folding turn is obv something i would heavily consider though

The problem is solved by raising OTF.

1) What flop were you hoping for with AJo?
2) Few people flop a monster and then donk into a big field, because they don't want to lose any action. But he's an 80's asian, so you don't know.
3) You still have the button behind, and all things considered, you'd rather be HU.
4) The pot is already huge, so aggression is preferable over trapping.
5) Whatever I left out.

As played, looks like the nuts.

Unusual lines for unusual hands. Odd way to play it, but he flips AA here, probably 85% of the time. He's willing to risk the suckouts because he enjoys boss snaps on young punks.

Raising flop makes no sense here this deep. It will allow him to fold QJ,KJ type hands while achieving what he wants if he has a monster.

I am not trapping, I am pot controlling.

Wisdom. We only need about 30% to shove here, plus our line looks pretty weak and capped plus our read on villain. It's close, but I would probably shove.

IMO "pot control" is a specious concept, invented by specious experts. He rarely has KJ or QJ; you're basing your argument on cherry-picked suppositions.

Your call will alert him to the possibility he is beat just as much as a raise would, if he does have a weak jack.

If he never has KJ or QJ then what are we raising for?

I didn't say never; if you want discussion, I insist you not misquote me.

Much of the value of a raise here is vis-a-vis OTB, who is yet to act. You definitely don't want to play the turn this same way, with one ahead and one behind.

So you want to
1) over rep our hand
2) make things easier for the donker
3) inflate the pot so our advantage of position becomes useless

just because there is a button who is yet to act who has shown no interest in the hand thus far.
If button raises after Hero calls flop its an easy fold so we save chips that way so the button only becomes an issue on the rare times when he flats.

+1 to all this. Raising bloats the pot and lets him play perfectly. The guy donked big into a large field. We should be trying to get to showdown and utilizing our position.

The raise doesn't ACTUALLY do any of these things. But one could IMAGINE that it does.

This flop connects with a large number of possible hands in a 6 way pot, and you may very well have a hand that is best right now but very vulnerable. Giving up a chance to pressure OTB is clearly an error, IMO.

OK, but he noted that this elderly, Asian villain has done a lot of raising and checkraising. He's not an OMT.

Your table sounds like mine, where after a few limpers $20 just ain't gonna narrow the field. So either raise more or overlimp, imo.

I'd also just call the flop as I'm not ready to give up yet.

We have to have a plan before we bet the turn. Against most ABC guys, we're probably fairly comfortable folding to a check/raise. But against this guy, we're not. Are we cool with calling a big check/raise and then playing for stacks on the river, or folding to the raise and giving up a big pot? I'm guessing not. So I'd check the turn behind. If he's on a OESD (the only real draw on the flop), he's only going to hit it 1 outta 6 times; and I'm guessing he bluffs the river quite a lot of the time when he misses, giving us an easy bluff catcher while controlling the size of the pot and not being bluffed off what could be the best hand.

As played, just do what you planned to do to a big check/raise.

GcluelessNLnoobG