The Aristocrats..
 

LMAO..i just watched this Documentary on it..lmao..that joke is so SICK! but it's funny as hell...

if you aint seen it...look it up on Youtube..just type in THe Aristocrats Joke..

the best are Bob Sagets, Gilbert Gotfrieds, Southpark's version and a few others..lmoa..this joke is SICK A S FUCK..not for the weak of mind..