The annoying practice of begging people for something, usually money. Usually when someone scabs they will repeatedly ask a passer by (especally someone they know by name) for the thing they are after until they give in.
by miss scabber May 06, 2009
Furiously masturbating for prolonged periods of time. The penis skin may be so traumatized that scabs begin to form.
by Jon Ralfio June 02, 2014