The male reproductive organ. A penis. The term was introduced into popular cultrure via the image board and troll website 4chan.
I don't like it when men try to touch my harbl!
by zuba February 21, 2005
A cat penis. Note: This term is only used by cat's.
I'm in your sink stroking my harbl.
by BMFvBadMoFo July 08, 2006