Fisterine 

The sexual act of coating ones hand with mouthwash (usually Listerine) and performing the act of fisting.

I tell ya Rod, my woman gave me the ol' Fisterine yesterday, now I'm walkin' funny .

Fisterine by Tim Crowbar October 25, 2017

fosterize 

the act of breaking, butchering, or fucking something up that was perfectly fine for no reason other than personal satisfaction

Damn, you sure did fosterize that welcome mat Patrick!
Did you see the way he fosterized that car?

fosterize by Wiggly 1 March 20, 2013

fustering 

to incite arguments by incessant badgering and passive aggressive behavior.

people found his constant fustering of others tiresome and childish

fustering by jack_hammer December 7, 2015

Fostering 

When you simp so hard, you can't end a platonic friendship with your crush.

"I thought Francesca didn't want to be friends with Jacob anymore"
"Nah bro, hes fostering so hard she forgave him"

Fostering by Ben Benkins February 6, 2020

Listerine infection 

Listerine infection refers to a medical condition caused by the excessive use of listerine or similar antiseptic solutions used to maintain oral hygiene. Its symptoms include a rise in temperature, walking sideways, stalking your exes new girlfriend, a bitter taste in your mouth, cardiac insufficiency and apoplectic stroke like symptoms. If you notice any of the before mention symptoms immediately stream “Becky’s so hot” by Fletcher and presave her debut album “girl of my dreams”.

Listerine infection is a bad taste - Fletcher

I heard Cari has a bad listerine infection

Listerine infection by Fletcherssohot July 28, 2022

Fosterline

Software used to adopt children. (Subsidiary of Timberline).

Person A - You've been on the computer for awhile.
Person B - Yea, just been surfing fosterline. Lots of children to choose from.

Fosterline by lifeduzt July 23, 2010

Festering Cunt Sore 

An ultimate derogatory term to be used when you need to insult a complete and utter fuck wit and shut them up when they are insulting you!!

Roger, you are without a doubt the most unfortunate festering cunt sore that i have ever had the misfortune to lay my eyes on! Now fuck off!!!

Festering Cunt Sore by Dr Phill17 July 2, 2009