FungleButt 

When you get mold growing on your butthole/taint.

Bro I think I’m getting funglebutt. I’m gonna try scratching it off

FungleButt by GoingHardWitDaWhiteChode February 11, 2020

fucklebutt 

The ultimate form of the exclamation “fuck!” Used when something very, very, unfortunate happens.

You: “my dog just died.”
Me “I’m sorry...”
You: “my sister was holding her, and...”
Me: “and what?!”
You: “and they both got run over by a bus and died.”
Me: “that’s a total fucklebutt!”

fucklebutt by The Great Shrimpini February 11, 2019

flinglebutt 

A very convenient term for annoying younger siblings without incurring the wrath of your parents.

Sam is a flinglebutt, a flingle-flingle-flingle-butt.

flinglebutt by SheKnowsWhoDidThis January 13, 2009

Finglebutt 

When she wants you to finger her jiggly butt

Michael:dude how did it go with Marrissa last night?
Jamie:she wanted me to finglebutt her!

Michael:how did that go?
Jamie: it was awesome

Finglebutt by Finglebutter June 23, 2016

Funglenuts 

Any variation or combination of of an unknown STD or bacterium that would cause ones balls to stink and itch.

Man, I think your girlfriend gave me the funglenuts.

Funglenuts by Drewser March 17, 2009

fundlebuster 

when someone engulfs your face with their buttcheeks

Dude, it was so funny-
when you were sleeping I fundlebustered your face!

fundlebuster by kevin dwyer May 10, 2007

fudgebutt

Can't stop pooping , diarea

Nuggy has a bad case of the fudgebutts

fudgebutt by Big Oz 11221 October 17, 2008