This is the name given to a person who takes the viginity of someone else. They themselves may also be a virgin, in that case both of the partners who partake in a bit of hanky panky are themselves virginsteins for taking their partner's virginity away from them.
A woman made love to a man who was still a virgin then later she said afterwards 'I'm now your virginstein!'
by evangeliclauz November 05, 2007