Mine's FRAK or FRACK.
Frack is a fictional version of the well know expletive and was first used (with the original spelling "frack") in the Battlestar Galactica series. In the later series it was used with the FRAK spelling to make it more of a real four letter word. I of course am a fan of the more retro spelling.
There are other uses probably as a reference in hommage to the original series:
Eureka, The Big Bang Theory, Veronica Mars, 21 Jump Street, Better Off Ted, Warehouse 13, Chuck, 30 Rock, Babylon 5 and Castle. It has also been used in the 2012 video game Transformers: Fall of Cybertron.
I take mine from Douglas Adams - Hitchhikers Guide to the Galaxy.
As in: "You're a jerk Dent, a total knee-biter."
Taken from the scene where the immortal alien, trying to find something to DO with eternity, devises a plan. He decides that he will insult every single living thing that ever exists in the Universe, ("...and this is the part he really gritted his teeth over...") in alphabetical order. So he builds a time-machine, prints up a list of names, and gets started.
Dredd's "Drokk" is my favourite.
Reading 2000AD in the late 70s was mind blowing - feel lucky to have been around at the time and be of an age to really appreciate it.
LOL well I think I should have but I reckon I am too partial to the single syllable utterings. In a heated moment they would work best.
I think I must grab my old 286 laptop, go down to a coffee shop pretend to work on some ancient word perfect document and utter - in a slightly subdued manned - all the suggestions put forward in the replies here and see what happens. Perhaps even close my eyes and say "Mark eh Mork calling Orson, come in Orson..." and when I don't get a reply cry SHAZBOT!
"Shazbot" and "Frak" are the only two Sci-fi swear words that came to my mind. I guess I'm not as geeky as I thought I was... ;-(
I'm surprised that Mark, a noted Robin Williams fan, didn't mention "Shazbot!"
Come on....What the Frell. :)
gotta admit i was going with Smeg, but Shazbot wins for me.. I had forgot about it.. i think im going to start saying it from now on.. so the people who think im crazy will think it even more.
Shazbot, from Mork & Mindy, by way of Tribes 2.
Wow, Mark! How'd you do that?
Mine is smeg and smeg head from red dwarf.