Thou... Vain Sheep-biting Ratsbane
Parts of what makes up this insult can be found in "Henry V" spoken by "KING HENRY V":

This insult has been seen 1 time on this site. This was on Wednesday, September 25th, 2019When down the hill he holds his fierce career?
We may as bootless spend our vain command
Upon the enraged soldiers in their spoil

A total of 10308 insults have been uniquely generated 10778 times, with a total of 125000 (or 50 to the third power) insults available in the system!