1 definition by KnowIdea
The fat that surrounds one's penis. Usually more previlant in those of a larger carriage. Peter fat will also give the appearance of a 'shrinking penis'
Shelly: “How are things going with you and Billy?
Jane: “Not great. Thanks to his Peter Fat he’s down to 3 inches…”
Jane: “Not great. Thanks to his Peter Fat he’s down to 3 inches…”
by KnowIdea January 17, 2012