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1.
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*
by roco66 February 23, 2010
 
2.
A other way of using "face palm" but this one is much harsher as you would slam your face/forehead into the wall because of how stupid/overused something is.
Joe: They should make a futuristic version of Modern Warfare! That would be so awesome! You could use short lightsabers for knifes and force grenades!

Bob: *Face wall*

Joe:Why'd you do that?!?

Bob: YOUR IDEA IS FREAKING RETARDED!
by Carnivore_JJS December 12, 2009