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