I suggest "French". It could be pretty much a drop-in replacement. "That mother-frencher is so frenching stupid." "French you, you french-hole." And so forth.
You got a frenching problem?
It's interesting you say that. Most of the barnyard, sexual, and body part swear words are the ones that come from German origin. The words of French origin are the ones that are considered polite. Sexual intercourse, derriere, manure - all French. I'll let the rest of you think up the German replacements.
So at its hearts, the ban on these words is a racist assessment that the Germans are too course and crude in their language to be used in polite company.
> I suggest "French".
Tried that myself, actually. Back in 2003, when that silly "Freedom Fries" thing came up, my response was not to remove France from vocabulary, but to *add* it. "I had to go to the frenchroom and take a chirac, but there wasn't a roll of francepaper."
But to be truly effective, a good expletive has to *sound* harsh. And French... just doesn't.