Term that arose in Counter-Strike: Source scene. It means spraying whole
clip at the
enemy at close to mid range whilst not hitting him with any
bullet. It implies monsterfail at aiming.
Player hides behind a corner and enemy runs by him without noticing hidden
gamer. Hidden
player ducks and sprays whole clip at the enemy from behind but hits him just once or not at all. Such action can be commented: "p0ful3n0".
pretty much same as if you'd call it monsterfail