A single twisted, knotted mat of hair protruding from the side of a woman's head obtained when the man she has just finished giving oral sex to has ejaculated into her scalp then quickly rubbed it in with his hands (in the hand-warming motion of rubbing them together quickly).
If performed correctly, the result is permanent and can only be removed by cutting off the entire Dreadlock with scissors. It may or may not be kept as a trophy by the man.