Thou... Vain Shard-borne Clack-dish
Parts of what makes up this insult can be found in "Henry VI Part 2" spoken by "Captain":

This insult has been seen 2 times on this site. The first time was on Friday, September 6th, 2019And thou that smiledst at good Duke Humphrey's death,
Against the senseless winds shalt grin in vain,
Who in contempt shall hiss at thee again:

A total of 10472 insults have been uniquely generated 10953 times, with a total of 125000 (or 50 to the third power) insults available in the system!