$200NL 6-max @ FT.

i raise [Ts] to $7 in CO. SB calls. $170 effective stacks. first hand, unknown villain.

flop: [4s][4d]
pot: $16

guy leads $5. i make it $16. he thinks for a while and makes it $27.

mere mortals would fold here but i make it $51. he thinks and thinks and calls.

turn:
pot: $115 or so

he checks, i bet about $50 of his remaining $100-ish. he calls.

river:

he shoves for his last $50 and i obviously insta-call. thoughts?

jon

flush draw for him?

Looks spewy against an unknown. Your re-raise on the flop is not folding out anything. A better line would be to just call when villain raises to 27 and then make your move on the turn. That said, I hate any of these options against an unknown. This guy could be the hugest showdown muppet and you are trying to bluff him off his KJ that he will not fold.

I'm not sure what villain has here...he has played it very much like a donk might play JJ or a 4 or a flush draw.

No matter the results its spewage IMO.

small bet + reraise on flop seems pretty strong, I'm mortal so i fold right there
the turn , once you bet it , you can't fold anymore
I think he might have suckered you into a big pot
I can see him having AJ, A4, JJ, 4X , best case he has a good J and got stubborn or a missed flush , but with no reads you might be better off folding the flop to the raise

Your flop raise is too small