One more entry, only because I don't think that any quirky quote contest can possibly end without something from Monty Python and I didn't see any on the list yet.
“I don't wanna talk to you no more, you empty headed animal food trough wiper! I fart in your general direction! Your mother was a hamster and your father smelt of elderberries!”
Now how's that for a quirky insult? The next time you get cut off in traffic you can repeat this (with a heavy british accent) to the person instead of getting road rage.
Did I mention I have a warped sense of humor?