Thou... Droning Clay-brained Clack-dish
Parts of what makes up this insult can be found in "Henry IV" spoken by "PRINCE HENRY":

This insult has been seen 3 times on this site. The first time was on Tuesday, June 4th, 2019gross as a mountain, open, palpable. Why, thou
clay-brained guts, thou knotty-pated fool, thou
whoreson, obscene, grease tallow-catch,--

A total of 10430 insults have been uniquely generated 10908 times, with a total of 125000 (or 50 to the third power) insults available in the system!