Here are some of my personal favourites:
"You egg, you fry of treachary!"
"Thou art a boil, a plague sore, an embossed carbuncle in my corrupted blood!"
"Foul spoken coward, that thund'rest with thy tongue, and with thy weapon nothing dares perform!"
"His wit's as thick as a Tewkesbury mustard."
"Thou damned and luxurious mountain goat!"
If you'd like to continue the fun (and why wouldn't you, you subtle whore) feel free to pop on over the the Shakespearean Insult Generator. Hours of fun.