PC.net

Facepalm

(/ _ < )	Copy
	Popularity	★ ★ ☆ ☆ ☆  Uncommon
	Direction	Vertical (not tilted sideways)
	Added	August 30, 2012
Description: Shows a person smacking his face with his right hand; depicts the hand and arm with the "/" symbol and an angry squeezed eye with the "<" symbol.

Emoticon Information from PC.net
https://pc.net/emoticons/facepalm