Ninja looting or power-up stealing in an online game, usually at the dispair of the enemy or disregard to teamplay by taking health or armor from a flag carrier or injured teammate... then running off, hiding or immediately getting killed, thereby wasting the power-ups or leaving the other victim high and dry to get killed themselves. Usually happens in pickup games or MMOs
In Unreal Tournament pick-up games, someone almost always pulls a loot and scoot with the shield seconds before the flag carrier comes by... then we lose the game beacuse the FC dies at the last second.
In World of Warcraft, rogues often perform the loot and scoot while you finally engage the monster standing next to a chest.
Taking ALL the ammo at the start of a fps round does constitute as a loot and scoot, leaving everyone else without ammo until it respawns; thus crippling the entire team.