Skub
A fictional substance of unclear purpose created by webcomic The Perry Bible Fellowship. The comic features "Pro-Skub" and "Anti-Skub" characters fighting each other over their skub affiliation. It is never explained why skub incites such violence, and thus skub has become synonymous with things that cause unnecessary RAGE. For instance, Warhammer 40,000 and WARMACHINE are oft referred to as Skubhammer and Skubmachine.
FUCK SKUB SKUB FOR LIFE (if you can call it a life, you filthy skub user.)
SKUB KILLED MY SISTER AND TURNED HER CORPSE INTO A GIANT FUCKING MONSTER
JUST BECAUSE YOUR SISTER WAS A FILTHY HERETIC THAT DIDN'T BELIEVE IN SKUB. SKUB WILL BRING US THE SALVATION!