fish donking the river

[Sibelius]

UTG is loose-passive. Not sure what he's river donk means.

Pf: hero is CO K [img]/images/graemlins/spade.gif[/img]7 [img]/images/graemlins/spade.gif[/img]
UTG calls, hero raises, Button 3-bets, SB calls, BB folds, UTG calls, hero calls

Flop: K [img]/images/graemlins/club.gif[/img]J [img]/images/graemlins/club.gif[/img]3 [img]/images/graemlins/spade.gif[/img] (13 SB)
check, check, hero bets, Button folds, SB folds, UTG calls

Turn: 7 [img]/images/graemlins/heart.gif[/img] (7,5 BB)
UTG checks, hero bets, UTG calls

River: 4 [img]/images/graemlins/club.gif[/img] (9,5 BB)
UTG bets, hero calls