The act of filling a 1 gallon milk jug with cow semen and an irishman's piss, then giving it to a person you dislike to consume.
Paulie thought he was doing the one gallon challenge with milk, but little did he know that Wally pulled a Dirty Flanny.
by Flanny June 26, 2012
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Dirty Flanny
• dirty fanny
• Dirty Old Fanny
• dirty
• Dirty Bird
• dirty south
• dirty harry
• Dirty thirty
• dirty d
• Dirty Mike
Bulma: If you give me the dragon ball I'll give you a little peak.
Goku: What do I care about your dirty old fanny?
Bulma: IT'S NOT DIRTY YOU RUDE LITTLE BOY!!!!!!
Goku: What do I care about your dirty old fanny?
Bulma: IT'S NOT DIRTY YOU RUDE LITTLE BOY!!!!!!
by FaggotKiller2001 April 3, 2022
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