Dirty Duncan 

A skank bitch that rarely bathes and turns her underwear inside out to get extra days out of them

Man did you get a whiff of that dirty duncan that just walked by? good lord she smelt like fish sticks and gouda cheese!

Dirty Duncan by Big Bizniz October 24, 2008

dirty duncan 

To do it in the Dunkin Donuts parking lot.

"We did the dirty duncan."

dirty duncan by Percival Frankwiler November 26, 2005

Dirty Sandy Duncan 

When a man rips a girl's eye out of the socket and procedes to have intercourse with the empty socket.

--Why is Jenny wearing an eye patch?
--Her boyfried gave her a Dirty Sandy Duncan last nite

Dirty Sandy Duncan by ultimatefaker March 10, 2004

Uncle Duncan's Dirty Diver 

When you engauge in anal intercourse with a female and you pull out your member and you notice she left you a present sitting inside your pee hole.

Guy 1 "dude she let me do her in the poopshoot for the first time!"
Guy 2 "Oh yea how was it man?"
Guy 1 "great besides the fact she left me with an Uncle Duncan's Dirty Diver"

Uncle Duncan's Dirty Diver by motoxyamaha2 April 22, 2008