drunk wound
A drunk wound is a wound that you find after a crazy day/night of drinking and you either don't remember how you could possibly have inflicted it upon yourself or don't remember yet. Drunk wounds are commonly very strange in size and orientation.
The next morning after a day of drinking I found a drunk wound on my pinky toe. There were two similar marks on either side of the top of my toe that were about half the diameter of a pencil.