to camp (vt): Quake/first person shooter jargon for act of fortifying oneself / staying on area where all the power-ups / ammo respawn.

Generally camping is considered a sign of cowardice and bad playing skills - however, as noted by Sycrim below, these days in some game modes of some FPSes it actually makes sense (though, as usual, it depends on circumstances...)

Russians: "Satanski kamperski! Aimbotski da da!"

Finns: "Go play Quake, Peelovich, Finns are supposed to use delay tactics."

- Half-Life: Winter War article in Pelit, by Niko Nirvi.