A Wisconson Bukkake Special is a race between two guys to cum in a girls mouth. To start out, each guy must milk the girls tit until they have an entire glass of milk, or until the woman cannot produce anymore milk. They then chug the milk as fast as they can. When they are done drinking they masturbate, and the first person to cum inside the girls mouth wins.
Yesterday, John and I had a Wisconsin Bukkake Special, and the girl could not feed her baby because we drank all her milk.