1. Reverse of a hard-on
2. When the sight of a disgustingly ugly piece of ass makes your dick want to curl back inwards in fear of its master whipping it out and taking it near that disgusting, ugly vajayjay.
Dude, I dunno how he gets with her, she gives me a REVERECTION.
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.