facepalm

Facepalm is a colloquial term referring to the physical gesture of striking one's own face in a display of exasperation. It is similar in function to a sigh. In Internet discussions, the term is used as an expression of [...] disgust or general woe. (via Wikipedia)
See also: facedesk - The act of planting one's face into a desk at high speeds, usually due to frustration. (via urbandictionary.com)

Olivia explains over here, what a facepalm is. And I thought a "Facepalm"

would be very appropriate, for the picture I'm about to post.