In place of h*ll, my uncle says "John Brown." Has anyone else heard that one?
Fornicate instead of f***? That is hilarious!

I'm going to borrow that....
I've heard "Fubar" a lot (F****-ed up beyond all recognition). My personal favorite is "fudruckkers." (I know it's the name of a restaurant, but something about it just sounds bad.

)
M.V.