Thou... Vain Fool-born Barnacle
Parts of what makes up this insult can be found in "Henry VI Part 2" spoken by "Captain":

This insult has been seen 1 time on this site. This was on Saturday, July 30th, 2022The princely Warwick, and the Nevils all,
Whose dreadful swords were never drawn in vain,
As hating thee, are rising up in arms:

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!