RFC3092 [Etymology of "Foo"] odkrywa przed nami, skąd się wzięła popularna nazwa foo oraz bar 
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When used in connection with `bar’ it is generally traced to the WW II era Army slang acronym FUBAR (`Fucked Up Beyond All Repair‘), ter modified to foobar. Early versions of the Jargon File [JARGON] interpreted this change as a post-war bowdlerization, but it now seems more likely that FUBAR was itself a derivative of `foo’ perhaps influenced by German `furchtbar’ (terrible) – foobar’ may actually have been the original form.
