FUFN 

Friend(s) Until Further Notice

"Bro, she's cute! You should go for her!"

"Nah, she's just my FUFN"

FUFN by tyler611 August 1, 2012

fufner 

An old man who wears a hat. Usually sporting a large mustache and cardigan (knitted).

Hey, you sass that hoopy fufner? That cardigan makes him look teh smoog.

fufner by Ben July 27, 2003

Fufny 

When something is funny

OMG EVERYTHING IS JUST SO FUFNY

Fufny by EmIsDaddy April 12, 2017