Windowfile 

Constantly looking out the window at other people

My neighbour constantly tells me that "there's a windowfile over there!"

Windowfile by Eddy Banana July 15, 2022

Windowsill Bay 

Time away from work spent at home.

"Where you going next week when you are off work?"

"Windowsill bay"

Windowsill Bay by Bristol Tone October 4, 2008

windowsill363 

A toxic user which is on Roblox and likes to send hate, rape threats and pedo messages for some reason.
A well known user on the shitstake known as ACR, which is now shut down.

Person: yo windowsill363 is such a cunt

windowsill363 by emilytheslagg May 19, 2019

windowcleaner 

Used when referring to a person which had a sexual experience where he/she got caught by an individual or a group of people

"Hahaha look at cloud-, remember when he cleaned the window?"

or....

"Oh cloud, remember the windowcleaner?"

windowcleaner by VegetaSan January 18, 2007

windowmime 

(noun) The act of broadly gesturing and/or mouthing words to someone on the opposite side of a pane of glass (e.g., a window, car window, etc.), even if the other party could hear you if you spoke.
(verb) To engage in an act of windowmime.

"Betsy let me know she needed her car keys after she went outside by the key-usey-hand-twisty windowmime."

windowmime by Kauffy November 16, 2018

Windowsill 

Person who sleeps on a pillow (ususally the bottom in sex.)

You are such a Windowsill

Windowsill by max/seb May 25, 2021

Windowsill 

A sill for your window (you put stuff on it)

Hey Barry do me a favour and put my goose on the windowsill.

Windowsill by Sara Eley ur G February 3, 2018