Gkick, or "ground" kick, allows a character to kick an item on the ground in a random direction during combat. If the kick is successful, the item remains on the ground and is unharmed but is moved to an adjacent room. Items can be kicked regardless of the item's material. (i.e. elves can gkick iron, drow can gkick mithril). A character cannot gkick while blind.
Basically, it akes disarm and disarming skills slightly more useful for elves and drow, but still not as useful as if they could actually handle iron and mithril. When they disarm an opponent the opponent has to actually pick up his weapon in a timely manner or risk it being gkicked to an adjacent room. This compared to the current situation, where they know the elf/drow can neither pick up nor sacrifice their weapon.