I love "frell" (as well as pretty much everything else in FarScape)! "Frak" does sound more guttural and comes across as far more aggressive (especially whenever the likes of Saul said it), but is far more multi-function covering both 'fuck' and 'hell' all in onePersonally, I'm still crushed that "frell" didn't catch on the way "frak" did.

It's amazing how much TV alters and expands ones profanity dictionary, for example I have found myself uttering "Holy shitsnacks!" more and more (thank you Pam Poovey).