Can't find that either, but that doesn't mean it's not a word. However, it doesn't conform to the normal pattern of German phonetics: no K after a diphthong. More likely it would be freichen, fraichen or freuchen but I can't find them either. We need a native speaker here. I found this website that is one guy's list (probably un-peer reviewed) of German profanity: http://www.geocities.com/me_sh_ug_ge/swear.html He says that: German has no single word for "fuck." The word and the concept are not considered nearly as obscene in German culture as in others. Germans have picked up the English word. The one example of a literal translation in his list shows ficken, which is the same word my German-born friend remembered. This gives me two personal citations for ficken, which strengthens but does not certify the etymology of "fuck" as a native Anglo-Saxon and possibly proto-Germanic artifact.