(also face palm)
Definition of facepalm
noun
[freq. as exclamation] a gesture in which the palm of one’s hand is brought to one’s face, as an expression of disbelief, shame, or exasperation:the site collects photos of our favorite facepalms I’m pretty sure said friend now thinks Anne and I are dating—facepalm!
verb
[no object] bring the palm of one’s hand to one’s face, as an expression of disbelief, shame, or exasperation:how many times did she facepalm during the hearing?