facewall
Unification of ones forehead with a wall as a means to vent frustration or disappointment, often forceful.
Professor: Ok guys, so is 1 a perfect square?
Class: *with conviction* Sir, NO!
Professoir: *facewall*
Class: *with conviction* Sir, NO!
Professoir: *facewall*
facewalling
The act of (usually inadvertently) walking into obstacles in a videogame due to inexperience with controls or distractions.
After a couple minutes of awkward facewalling, he finally made it out of the starter zone.