Top Definition
A medical term used to describe the orientation, as seen on an Xray,of a man's penis with respect to his lower extremity injury. A positive Throck-Morton sign is when the penis points to the side of the injury.
Senior Doctor: Mr. Jones has a femur and tibial fracture of his right leg.

Intern: Incidentally, I note on the x-ray that was taken of his pelvis that his johnson is pointing to the right - the same side as his injuries.

Senior Doctor: That, my young man, is a positive Throck Morton Sign.

Intern: I have so much to learn!

Senior Doctor: Indeed you do, indeed you do.
by RTA16 August 15, 2008

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If you break your hip your dong will always point to the side that is broken.
Tom wiped out shredding the gnar, his X-rays show his dong pointing left. Doc says the throckmorton sign never lies. It's l fractured left hip .
by Turd furgason January 30, 2014

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