A not-so-rare incurable disease of which you can either be born with or it can be passed on to you through significant exposure to a person(s) infected with Full Blown Jackass, In cases of the latter it would be referred to as Second-Hand Jackass.
Referred to by Physicians as FBJ
Symptoms of FBJ are as follows:
Uncontrollable Hatred of everything and everyone,
Inability to speak Truth,
Kane: "Hey Albert can you buy me this game for my bday?"
Albert: "Naw man I gotta get this card deck"
Kane: "But you don't even have anyone to play it with..."
Cashier: "...and heres your deck sir"
Kane: "Wow my brother is such an asshole."
Rob: "Hey man, what do you expect? Poor guys got Full Blown Jackass"