Bridge hogger

An often perfidious person who commits the act of needlessly getting in one's way or stealing one's turn.

Also used as a verb to represent blocking the pathway to one's metaphorical bridge or chosen passage.

A variant on the verb "to snake", also meaning to impede upon a person's path.

Dude, I was playng Legend of Zelda on the Wii and that Yeti was a total Bridge hogger. What a bastard."