wolfbite

A variant of "shotgunning," a wolfbite is the coolest way to rapidly consume a beer. Instead of puncturing a hole in the side of a beer can and opening the top and chugging, the drinker bites a hole in the side of the can and chugs all the beer inside. Typically, the top of the can does not need to be popped. After the drinker has finished, the can is slammed to the ground and the drinker howls like a wolf.

On a hot day when you walk around for a while and your scrotal region perspires and your sac grinds against your legs for an extended period of time it will form a minor rash/sore area.
This is called WolfBite

The name of a person that is the leader and main character of a group or series