TT in SB

CO is one of the biggest lags I've seen in some time. He is really spewwing chips. Button is CC almost every one of his raises, and the BB is very lag as well. I know that check-calling the entire way is pretty weak, but I'm not sure it's not optimal against this type of opposition in terrible positon.

Ultimate Bet 2/4 Hold'em (6 handed) converter

Preflop: Hero is SB with T[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">CO raises</font>, Button calls, Hero calls, BB calls.

Flop: (8 SB) 6[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, BB checks, <font color="#CC3333">CO bets</font>, Button folds, Hero calls, BB folds.

Turn: (5 BB) 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets</font>, Hero calls.

River: (7 BB) 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets</font>, Hero calls.

Final Pot: 9 BB