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(something or someone) that makes your jaw drop.
Matt: "Did you see that girl?"
Mike: "Yeah she's a jaw-dropper."
by r.l.frisby November 27, 2008
something very surprising
The Incident of attempting to rethink the strategy regarding weapon smuggling grew into a jawdropper due to that one mistake.
by The Return of Light Joker July 17, 2011