It's clearly a noun.
(
Zuowan,
Sun 23 Jan 2011, 13:28,
archived)
*facepalms*
(
FeralCatMan Unusual disease collector.,
Sun 23 Jan 2011, 13:30,
archived)
I'll have none of that facepalming in MY class.
(
Zuowan,
Sun 23 Jan 2011, 13:31,
archived)