Top Definition
The act of thrusting the penis between the folds of an overweight person's stomach, ejaculating and the consequently vomiting over the member. The addition of menstrual blood causes the act to be known as a Mustard and Ketchup Hotdog.
"That fat girl let me do a Mustard Hotdog on her. It was messy"
by CountSpunkula February 21, 2010

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