Hey Neighboring
This describes the act of choosing a urinal right next to someone else who is taking a piss, instead of all the other unused urinals that aren't next to the one in use.
Example:
Dude you have got to stop hey Neighboring everyone in the toilet it's getting weird.
Jason likes to hey neighbor at the urinal
Dude you have got to stop hey Neighboring everyone in the toilet it's getting weird.
Jason likes to hey neighbor at the urinal