Thou... Unmuzzled Milk-livered Lout
Parts of what makes up this insult can be found in "Richard III" spoken by "GLOUCESTER":

This insult has been seen 2 times on this site. The first time was on Friday, August 9th, 2019And with thy scorns drew'st rivers from his eyes,
And then, to dry them, gavest the duke a clout
Steep'd in the faultless blood of pretty Rutland--

A total of 10625 insults have been uniquely generated 11125 times, with a total of 125000 (or 50 to the third power) insults available in the system!