Whist going down on a chick, placing your mouth over her vaginal opening and blowing her pussy up like a baloon; then you push down on her lower abdomen as if you are playing the bagpipes at a Scottish wedding. The resulting notes from the Vagpipes is just as musical as the best Bagpipes.
G: Hey Marc, why do you have a black eye?
Marc: I surprised my new girlfriend by playing the Vagpipes last night...hey, she tasted like tunafish, what else was I going to do to entertain myself while I was goin' at it?
G: Well worth it!