Wufflefluff 

A butthole that is too large to measure by convenient methods.

After years of scientific research on the diameter of Tommy's butthole, they decided to classify it as Wufflefluff-1. The first butthole that was too large to measure.

Wufflefluff by pottedWillow September 8, 2020

Wufflepuff 

An imitation of awesomeness.

Ken: Sarah, wasn't that cookie awesome?
Sarah: No Ken, it was just a wufflepuff, nothing like a limited edition Oero.

Wufflepuff by Rockstar Princess November 2, 2008

wumblefluff 

The act of extreme fucking without the blood torture. Doesn’t have to be legal

Johnny wumblefluff did the fuck outta that bunny

wumblefluff by Bilbothedildo11 May 3, 2018