facepalm

 
Pronunciation: /ˈfeɪspɑːm/
informal

noun

[freq. as exclamation]
  • a gesture in which the palm of one’s hand is brought to one’s face as an expression of dismay, exasperation, embarrassment, etc.: I’m pretty sure said friend now thinks Anne and I are dating—facepalm! you have to see this one to believe it—it definitely merits the double facepalm

verb

[no object]
  • bring the palm of one’s hand to one’s face as an expression of dismay, exasperation, embarrassment, etc.: did anyone else facepalm during this scene?