When one person sits down to take a shit, and another person sits on top of that person and shits through their legs.
Suzie was pooping on the toilet and John sat on her lap and did the same. They performed the Duplex.
by Brian Brown November 19, 2004
A duplex lived in by a group of young guys who never clean up, never throw away garbage, do not do any dishes and whose sink is always clogged. A Dirty Duplex is completely disgusting, smells rancidly at all times and guests can never be brought over to visit.
by GSP December 06, 2007
Amanda: When you go to the store please buy me some chips ahoy.
Joey: Fuck that! All I have is 80 cents so I'm gettin some duplex cookies sandwich cremes.
Joey: Fuck that! All I have is 80 cents so I'm gettin some duplex cookies sandwich cremes.
by bama_slammer January 29, 2012
When a guy stacks two women on top of each other and is able to have vaginal sex with both of them during a threesome. If the guy gives either or both girls a creampie the duplex is said to be occupied, otherwise, it is considered vacant. The girls can be stacked in any manner; front-back, front-front, or back-back and they can face upward or downward.
"I was able to fuck Gina and Brooke in a Milwaukee Duplex. I occupied both of them; I hope they are on the pill!"
by Milwaukee Guy June 12, 2007
So I saw this heavy homeless woman having a pee in the dunes. Before I could look away she hiked her skirt and I thought "Yikes! Duplex pussy."
by LMS Miami February 03, 2012
by danny19990 April 05, 2018
Far worse than the traditional herpes simplex. This is a case of herpes infecting both genitalia and mouth. So it is some nastee stuff. Steer clear.
by bobert_ohio February 09, 2008