Poker Stars $1/$2 No Limit Hold'em - 6 players
The Official 2+2 Hand Converter Powered By DeucesCracked.com

SB: $201.00
BB: $371.30
Hero (UTG): $233.45
MP: $839.15
CO: $205.20
BTN: $176.00

Pre Flop: ($3.00) Hero is UTG with J J
Hero raises to $8, 1 fold, CO calls $8, 2 folds, BB calls $6

Flop: ($25.00) 5 6 2 (3 players)
BB checks, Hero bets $16, CO calls $16, BB raises to $42 Hero ?

BB playing 40/25/4 over 53 hands, no other history or reads, CO is 18/9/3 over 141 hands

id probably fold

or call and ship a turn. meh. (folding others).

Reasons for folding: c/r'ing over a cbet and a flat is pretty ****ing strong for most people, most people would c/r bigger with a draw to increase fold equity (though that could be different depending on the level that he's on, and maybe he wants you to ship a lower flush draw or a straight draw sometimes

But if this guy is a thinking player, he knows that CO has mostly pocket pairs that can't withstand a c/r, and you'll be a super tough spot with everything but the very top of your range. Therefore I think he has air overs some %, flush draws some %, pair + straight draws some %, 78 some %, and you're only crushed by 34 while drawing pretty thin against sets and 65.

In order to maximize value against that range, I think we should call and shove over most non club turn cards, because he's probably following up a lot.