
1) Alternative to a head slap 2) Internet meme 3) Nonverbal groan
Found on
https://www.crosswordclues.com/clue/facepalm

A facepalm (sometimes also face-palm or face palm) is the physical gesture of placing one`s hand flat across one`s face or lowering one`s face into one`s hand or hands. The gesture is often exaggerated by giving the motion more force and making a slapping noise when the hand comes in contact with the face. The gesture is found in many cultures...
Found on
http://en.wikipedia.org/wiki/Facepalm

To place the palm of your hand on your face
Found on
http://www.chatslang.com/terms/online_gaming
No exact match found.