Villain is a lagtard running 38/25/3. I haven't seen him get out of line.
He has pushed me out of a couple of pots where I had marginal hands. I kinda wish i bet more on turn. Does an overbet like 40ish on turn work in this spot?

PokerStars No-Limit Hold'em, $1.00 BB (6 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP ($55.75)
CO ($232.60)
Button ($98.50)
SB ($99)
Hero ($121.55)
UTG ($102.60)

Preflop: Hero is BB with J, K.
1 fold, MP calls $1, CO calls $1, 2 folds, Hero raises to $6, MP folds, CO calls $5.

Flop: ($13.50) K, 2, 3 (2 players)
Hero bets $10, CO calls $10.

Turn: ($33.50) 8 (2 players)
Hero bets $21, CO calls $21.

River: ($75.50) 4 (2 players)
Hero bets $41, CO raises to $195.6, Hero folds.

Final Pot: $157.50