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A guy that is someone's dad and uncle at the same time. So, it would be incest with their sister. Yeah, sick.
In Phelps, Wisconsin everyone's inbred so many kids have duncles and a mant.
by Chelzor April 12, 2006
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2
The name for a man who donates his sperm to his lesbian sisters wife/partner/whatever, there by becoming both dad and uncle of child.
Rachel's brothers Parker and Beecher
by Rachel and Alex January 19, 2004
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3
Dad/uncle: name, meaning the father had sexual relations with his sister, meaning the father is the child's Duncle.
Friend 1; "Did you hear Triston got his sister pregnant? "
Friend 2; "What is the kid going to call him, Duncle? "
by GodDammnitRonnie August 09, 2018
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4
a person who is a father(dad) and also an uncle to the same poor inbreeded child!! (tramp)
Mary and Samual get married and have two children...........these two children are called tom and gina......they are bro and sis, but they have sex. and have a child called molly. Tom is now a duncle and poor molly in an imbreed and is very confused
if u are related to a duncle ur family is compleatly and utterly fucked up
by total legend August 05, 2006
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5
a dad who marries one sister, divorces, then marries the other sister.
My dad is my aunt's ex-husband. That makes him my duncle.
by Ry-G. November 04, 2010
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6
The "Dirty Uncle", consists of two men, one of which who is mounted on the back of the other while standing up. lubricant may be required
Did you see William duncle that kid at the swimming pool?
by Drew Clark September 24, 2006
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7
A man who's son is also his nephew.
My duncle tried to rape me last night, no homo.
by Hova Jr. July 04, 2005
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