Thou... Bootless Fen-sucked Bum-bailey
Parts of what makes up this insult can be found in "Loves Labours Lost" spoken by "ROSALINE":

This insult has been seen 1 time on this site. This was on Saturday, March 6th, 2021And wait the season and observe the times
And spend his prodigal wits in bootless rhymes
And shape his service wholly to my hests

A total of 10429 insults have been uniquely generated 10907 times, with a total of 125000 (or 50 to the third power) insults available in the system!