Used in Warcraft DotA games.
When organized groups of confidently good players go to a cybercafe/ventrilo and team up against random pub players with no prior association.

verb. When an organized team of friends/clan members plays against a team of "pubs" - random people who join a public server.

The game is typically very one sided, despite the games being created under the false impression that it is going to be 'fair'.

Can apply to any team-oriented game, but the term is likely to have originated in DotA.

Can also be used as a noun, whereby the events described above occurs.

A term originating in the game Starcarft, where two or more friends would create a public team game and all join the same team, with the expectation that they would be playing against un-coordinated strangers.