2/4: This is a semibluf or bluff here a lot right?

[2handed]

6max, villain is fslexduck who i believe is a 2p2er HSNLer, but that is the extent of my prior memory of him. We have been playing for an hour on a couple tables and so for he has made a few bad plays and bluffs that may come from his holdem background, inexperience with PLO, or disrespect for the money at stake. He likely views me as a LAG capable of bluffing and folding.

In this hand he has 480, SB has 600 and is a bad LAG, and I cover them both.

Villain open-raises on the button, SB 3bets to 42 (he has 3bet preflop three of the last four hands), I call with AQ105ds planning to fold if villain 4bets since I have only seen him do that with AA preflop.

Flop (135): Q J 4 with two hearts I have no way to make a flush:
Checked around

Turn 2 offsuit: SB checks, I bet 105, Villain pushes, SB
folds, 330 more to me