back extension

A butt that, is very flat and resembles a long back leading up to the legs.

Damn she'd be a 10 if it wasn't for that back extension.

by the watch April 13, 2015

Peenial Extension

A penis

"She gave my Peenial extension the good ol' Sloppy Toppy

by URBANDADDY698 November 28, 2018

French Extension

Doing tricep extensions whilst a French girl rides you.

Juzzy Beefcakes went to the gym in Paris to work on his triceps. Halfway through his set he was pleasantly surprised by the young French lady who had positioned herself on his lap. He told his friends later on Facebook that he got a "French Extension". His friends were confused.

by Shabba80 May 20, 2014

file extension

and overrated part of a file name which everyone cares about

Person 1: Oh no don't download that. It has a outdated file extension!
Person 2: I don't care

by windows 2000 July 20, 2021

penile extension

a car which compensates for your penis that is 1/3 of a micron long when you poped a boner...

nice penile extension, bob

by http://www.animegamingforums.com February 27, 2005

extension of the back

a girl with no ass

by Anonymous April 19, 2003

penile extension

to get your penis enlarged

small paul getting bigger

by David boland October 25, 2003