American — Origin (?-1990's on)
A welt, blister, sore or rash located on the inner thigh—typically caused by the thighs rubbing together and, therefore, appearing on both legs. Common to men in shorts, those indulging on long walks in hot and/or humid weather, runners and fatties. Also applicable to welts, bruises or injuries caused by vigorous oral suction on the thighs or elsewhere on the body.
See also: hicky
Damn, I've been on my feet all day and I got this nasty-ass monkey bite. Hand me the Desitin.