An expression of frustration meaning "hitting your head on a desk." (The *s signify an action.)
I'm so freaked out about this test! *headdesk*

I can't believe that he hasn't called back!! *headdesk*
by Julianne Leanth April 5, 2005
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The action of slamming your head against a desk, wall, or other hard object because of complete misfortune. Related to facepalm.
The last day before Spring Break, when our teacher said we would have the next five days to complete our assignment I headdesked at the complete stupidity of our teacher.
by Hunterjumperblonde March 29, 2009
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Similar to a facepalm, except much more severe. Refers to the action of banging your head against a desk or table.
Girl 1: So I accidentally fell out of a window today...
Girl 2: God you are SUCH a blond. *headdesk*
by BitchandBastard October 14, 2011
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When a person becomes so overcome with fangirl delight that they can no longer support the weight of their own head, and it hits a desk or desk-like object.
Mr. X: "Did you see the new Twilight movie?"

Mrs. Y: "Yeah, I headdesked when the guy took his shirt off."
by Coutzy December 8, 2009
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