A term for an unsolved mystery, also known as "Leg in OKC" or "A Leg in OKC." Relates to the real-life P-71 mystery from the April 19, 1995, bombing in Oklahoma City, in which one human left leg was never identified:

An allusion to the name of the novel A Leg in Oklahoma City (2019), written by Greg Hoetker
"Hey, did you hear about the Malaysia airplane thing?"

"Oh yeah, the plane just disappeared. They never solved it. That's A Leg in Oklahoma City."
by Jack Hoover October 16, 2019
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