e-fenestration 

Accidentally alt-tabbing to an equally inappropriate window when your boss/parent suddenly appears.

Man, I had like...15 windows open on my PC at work today and only one of them was the report I was meant to be working on. Clicked from Facebook straight to YouTube when my boss appeared. Just a big-arse kitten playing a piano on my screen. Complete e-fenestration.

e-fenestration by Tommy G (Syd) November 5, 2009

fenessed

When someone lies or doesn't tell you something (in a humorous way)

Man why did have you fenessed me like this?

fenessed by Fernsayers_ March 9, 2017

fenks 

An verbal expression of grattitude. A derivative of the english 'thanks', the word 'fenks' has been invented by gypsies who live to the east of London, as their silly accents prevent them from speaking english properly.

fenks for dinner hunnybunch

fenks by JustJosh May 3, 2008

fenestripper

Someone who takes off their clothes while standing in front of an open window.

She was arrested when her neighbors called the cops and let them know she was a fenestripper.

fenestripper by Chipping Woodlet III June 10, 2007

fenestrate 

To install Microsoft Windows on someone's computer.

They won't like it, but the IT department says we need to fenestrate the entire department, including the ones who are using Linux.

fenestrate by my name is Cos April 16, 2009

The Fenestration Paradox 

The burning need (whilst stoned) to both lie down, get up and eat something, drinking something and play more Mario. This creates the ultimate paradox in that you can never be doing what you want to, despite attempting to do what you need constantly.

"I'm stuck in the Fenestration Paradox man."

The Fenestration Paradox by Zeddecus November 23, 2005

Fenessing

Means your the best looking mother fucker

Yo, you straight fenessing dawg!!

Fenessing by Jj6767 August 31, 2017