Yeah...there are a lot of 'em...
Shoot! What the heck... You bustard!
Izzit Friday yet?
Oh wait....
My favorite new one, I learned from g'nad; Fargin Bastige!!
Bastidges.
"By George, I'll pound you!"
Larry Niven's "Flatlander" stories used "censored" and "deleted" as swear words. It was pretty amusing - the characters were actually saying "you unprintable thing" or "censor it".