KK overbet on river by a drooler

[monkeymaps]

villan is 35/5/0.75 over 80 hands
think this would be an easy fold
but i did just snap off a bluff by villan where he limp RR in the CO and I called him down with TP he showed no pair no draw with 43 off


Poker Stars, $0.05/$0.10 NL Hold'em Cash Game, 6 Players
LeggoPoker (http://www.leggopoker.com)Hand History Converter (http://www.leggopoker.com/hh)

MP: $21.25
Hero (CO): $16.40
BTN: $11.95
SB: $9.45
BB: $15.50
UTG: $12.80

Pre-Flop: K/images/graemlins/club.gif K/images/graemlins/diamond.gif dealt to Hero (CO)
UTG folds, MP calls $0.10, <font color="red">Hero raises to $0.50</font>, 3 folds, MP calls $0.40

Flop: ($1.15) 8/images/graemlins/heart.gif 9/images/graemlins/spade.gif 3/images/graemlins/club.gif (2 Players)
MP checks, <font color="red">Hero bets $1</font>, MP calls $1

Turn: ($3.15) 4/images/graemlins/club.gif (2 Players)
MP checks, <font color="red">Hero bets $2.50</font>, MP calls $2.50

River: ($8.15) Q/images/graemlins/heart.gif (2 Players)
<font color="red">MP bets $8.20</font>, Hero folds

Results: $8.15 Pot ($0.40 Rake)
MP mucked and WON $7.75 (+$3.75 NET)

[Spenda]

getting 2:1 against a known bluffer whose range is polarized to JT/bluffs

[monkeymaps]

I guess I cant figure out what bluffs get to the river... and his range is def polorized but how do I use that to decide wither or not to call? is it 50/50 bluffs and the nuts? then I guess its a call but im not sure if its 50/50 thats why im lost in this spot

well it only has to be bluff 33% of the time to call right?