The act of filling a naughty bits orifice (usually vaginal or anal) with milk or a milk-like substance with a similar viscosity and then expelling it in a spectacular explosion, causing one or both participants to become awashed in a "milky way" or manner.
Dude, I went to this porn site and downloaded this brunette getting a milky way from a hot blond Hungarian chick!
by The Milk Man Cometh December 05, 2011