Thou... Vain Half-faced Barnacle
Parts of what makes up this insult can be found in "Henry VI Part 3" spoken by "WARWICK":

This insult has been seen 1 time on this site. This was on Friday, April 27th, 2018With promise of high pay and great rewards:
But all in vain; they had no heart to fight,
And we in them no hope to win the day;

A total of 10777 insults have been uniquely generated 11291 times, with a total of 125000 (or 50 to the third power) insults available in the system!