Hanging Organ
Noun -- Also know as the Skin Flute, it is slang for the male genitalia. The term is frequently used by teenagers, members of the Armed Forces, and construction workers. The object is frequently used by porn stars.
My wife has been asking me to get her music lessons, so I spent 400 dollars on piano lessons for her. She still can't play music worth shit, so now she'll play with my hanging organ as her part of the bargain, I guess!