1.
Originating (presumably) on the World of Warcraftforums, this is an essentially derogatory concept some people employ that means that all that a certain class must do in order to achieve success in the game is to bind every key on their keyboard to one ability that is perceived to be overpowered, and then continue to roll their face across the keyboard. The notion is that this one ability is so amazingly overpowered in relation to those of other classes, all one has to do is absently spam it as much as possible (and they might as well do it with their face, because there isn't any other use for the big stupid thing on top of their shoulders).
Priest: waah waah I'm a little bitch
Warrior: Oh stfu-
1) bind every key on your keyboard to Flash Heal
2) faceroll
See wow, face, roll, world, warcraft, rpg
2.
a term referring to the act of,in any fps(first person shooter), using your teammates as bait to weaken a large number of opponents, and then quickly running in and get several headshots with a shitty gun and thereby stealing kills, and points, from your teammates
dude, that guy is such an asshole. all he does is run in late and faceroll everyone
See fps, counter strike, cs