Sick Fluff Share definition Flag Someone who is really perverted or messed up in anyway. also used as an insult to call people like this. Jake-"I banged your mom last night." Derek-"YOU SICK FLUFF!" Sick Fluff by Baddy boy November 10, 2011 0 0 Get merch Get the Sick Fluff mug. Buy Now — $32.95 See more merch