One who makes cruel comments on an already frustrating or sad situation, thereby metaphorically rubbing salt into the wound. First use traced to Kristin W. Delli Carpini in NY in 2009
when one ejaculates into a condom, then tells a female (preferably) to give a blow job. And when she goes to do it pull off the condom so that she gets slapped in the face by semen and the condom, like a rubber band.