In the game of Eve Online, when a group of PVP pilots inadvertently come to "carebear," or to attack NPC pirates, usually because of a faction (special) spawn on a stargate that they are camping or holding on. It can also happen if there are small ships in the fleet that cannot take the NPC fire.
Said to be invented by Stealthfield members while on a roam through Etherium Reach. Not to be confused with "gay bearing."
Scout: Guys, look! There's a Dread Guristas spawn on the other side of the gate! Lets do some gatebearing!
Frigate Pilot: Guys, can we do a little gatebearing? These NPC destroyers are ripping me up.