Extension 

when someone chubbys stomach extends over his or her belt

Adam "Have you seen brandon with no shirt?"

Ben "Yeah hes got such an extension"

Adam "I know it goes out like two inches"

Extension by kyky7 March 12, 2011

extension roulette

The act of dialing multiple phone extension numbers to find someone who answers or can be of help, either within a company or calling in to the company.

Everyone must have been on lunch. I had to play extension roulette to get an answer.

extension roulette by iraman March 9, 2008

knock the back door in and put the extension up 

Polite euphemism for anal sex, just crying out to be written into an updated Carry On film based around DIY enthusiasts.

Jack Douglas : "I'll be finished as soon as I've knocked her back door in and put me extension up"
Sid James : "Hwar har har!"

knock the back door in and put the extension up by TC Raymond August 15, 2005

Extension cord 

A Woman that has sex or sexual favors in return for drugs

They call her the extension cord because she be pluggin all the plugs!

Extension cord by Fun - Size August 25, 2019

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.

French Extension by Shabba80 May 20, 2014

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.

back extension by the watch April 13, 2015

Peenial Extension 

A penis

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

Peenial Extension by URBANDADDY698 November 28, 2018