My limericks, with commentary, are collected in Original Clean Limericks, available from Amazon. See my book links.

Shakespeare's longest passage of invective is in King Lear, Act II, Scene 2. After you've read that, you might as well be nice, since you can't match up for insults. But his one-liners are also memorable. Such as "His wit's as thick as Tewkesbury mustard" and "The tartness of his face sours ripe grapes."