Lay down trips, top kicker w/1 overcard on board?

[MLSchaff]

Villain is 36/10/4 (only 31 hands).

What does this turn overraise mean? It commits villains stack although isn't a full push. Is laying this down completely weak-tight? Or is it possible that he's appearing to protect against a flush draw when we really has the made full house?

PokerStars No-Limit Hold'em, $1.00 BB (8 handed) internettexasholdem.com

SB ($197)
Hero ($96)
UTG ($64.50)
UTG+1 ($49.95)
MP1 ($88.15)
MP2 ($89)
CO ($283.85)
Button ($100.35)

Preflop: Hero is BB with 9[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, MP1 calls $1, MP2 calls $1, <font color="#666666">2 folds</font>, SB completes, Hero checks.

Flop: ($4) 9[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, Hero checks, <font color="#CC3333">MP1 bets $5</font>, MP2 folds, SB folds, Hero calls $5.

Turn: ($14) A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $10</font>, <font color="#CC3333">MP1 raises to $55</font>, Hero?