Thou... Vain Tickle-brained Fustilarian
Parts of what makes up this insult can be found in "Loves Labours Lost" spoken by "ADRIANO DE ARMADO":

This insult has been seen 1 time on this site. This was on Monday, November 28th, 2022I protest, the schoolmaster is exceeding
fantastical; too, too vain, too too vain: but we
will put it, as they say, to fortuna de la guerra.

A total of 10637 insults have been uniquely generated 11139 times, with a total of 125000 (or 50 to the third power) insults available in the system!