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.
by Rachel and Alex January 20, 2004
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
if u are related to a duncle ur family is compleatly and utterly fucked up
by total legend August 05, 2006
by Ry-G. November 04, 2010
by Hova Jr. July 05, 2005
by Duncle Nation December 29, 2019
A guy that is someone's dad and uncle at the same time. So, it would be incest with their sister. Yeah, sick.
by Chelzor April 13, 2006
by MyBrothersAreDuncles June 21, 2020