I think they use that word because of comedic value of the K sound (http://en.wikipedia.org/wiki/Inherently_funny_word http://en.wikipedia.org/wiki/Inherently_f

I think they use that word because of comedic value of the K sound (http://en.wikipedia.org/wiki/Inherently_funny_word http://en.wikipedia.org/wiki/Inherently_funny_word). "Buick" might work too? Hey author, please don't dilute our finite set of profane words. Inventing new ones is hard.