Lobby Pirate
A person who continuously changes online game lobbies match after match. Normally in games like Halo or Call Of Duty.
Dude: Man, I've seen that same guy in a team death match a few hours ago, and a demolition match a few minutes ago.
Other Dude: Hah. Totally a lobby pirate.
Other Dude: Hah. Totally a lobby pirate.