To quote eng1ne:
How did azurelunatic put it? "Fuckity-fuck fuck fuck on a fucking fuck-stick."
...actually, thinking about it now, I think it actually goes Fuckity-fucking fuck on a fucking fuck-stick, but either will do. Or both.
My great-uncle John's curse goes like this: "Shit, shit, shit. Shit, crap, and corruption. May prostitution prosper and sonofabitch become a household word." He said that every morning.
Good ol' Fuzzy Modem's borrowed signature curse is: "You bow-legged, bald-headed two-bit son of a sperm bubble out of a whore's yeast-infected pussy on period weekend."
GrandfatherSir's signature curse is, of course, the family curse, passed down to me by my father before me, and I don't use it except for on special occasions.
I'm amused that I am evidently so good at cussing, or seen to be so, because in real life, I'm a modest and demure college student, and one of the primary role models for an outstanding young man. I just cuss from time to time.