I've used that one more than once, which always has a Monty Python feel to it and usually winds up with things like "I fart in your general direction!" or "I wave my private parts at your aunties!"darthzew said:"I bite my thumb at you" is also a good one, noting your Romeo and Juliet reference.Anarchemitis said:That's why I use "Good Gravy", "Son of a [Capulet/Montague]" or "Poop".
If you've ever read Shogun, I found the usage of "Thy mother!" to be amusing, also.