[Verginius Rufus]

A well-known line from Monty Python and the Holy Grail seems like an appropriate response to Mr. Fox.

[BlueLancer]

"A well-known line from Monty Python and the Holy Grail seems like an appropriate response to Mr. Fox."

I fart in your general direction!
Your mother was a hamster and your father smelled of elderberries.
Now, go away or I shall taunt you a second time!

[rfp1234]

“I fart in your general direction.”