English▸ noun [often 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:
I'm pretty sure said friend now thinks Anne and I are dating—facepalm!
the site collects photos of our favorite facepalms.
▸ 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?