unleash the strontium dogs of hell
“Great Krypton!”
“By Hala!”
Bugrit! Millenium and and shrimp!
Oops… pardon my Klatchian.
Its strangely gratifying to see 2000AD swearing in here; stomm, drokk, grud, sneck etc
What was it the 3PO unit said to C3PO in ESB? “Bee-cho-tah”, quite rude apparantly 
The subtitles diplomatically call the cursing in Chinese “Galatic Talk” or some such alternative.
Great wasn’t it? And now I know how to spell that phrase 
<obscure> ADONADAY VEEHAH!</obscure>
TANSTAAFL. Grok?
(Ok, that’s not actually swearing. So go space yourself. Your mother was a pedestrian.)
Grok This!
You know what you are? You are an dirt breathing, atmosphere sniffing, ground worm. You heard me. I’ll have you know my Mom ran a skyhook to L5 Gamma.
Useless copsiks.
Well rape my lizard!
(Both Niven, but different series.)
You are all a bunch of dirty, dirty shiznos.
By Grabthar’s Hammer, this is a frelling drad idea!
A rare use of an actual word:
What are you looking at, sport?
From Tim Power’s Dinner at Deviant’s Palace. “Sport” = “genetic sport” = “freak.”
Bleb. As in “What the bleb?”, from Samuel Delany’s Empire Star. I forgot another 2000AD one, too: “Skev!” from Rogue Trooper.
It occurs to me that having Space Tourettes would be fun: Drokk! Bleb! Snut! Tanj! Stomm! Grud! Drang! Crut! Sneck! Glub! Smeg!
Swearing mighty oaths is fun, too, such as Doctor Strange’s “By the hoary hosts of Hoggoth!”