facewoooosh
When somebody wants to facepalm so hard that they completely miscalculate the trajectory of their hand and it goes over their head... literally
Comedian: What is the least spoken language in the world? Sign language.
Random Guy: But sign language isn't spoken at all!
Audience: FACEWOOOOSH!
Random Guy: But sign language isn't spoken at all!
Audience: FACEWOOOOSH!