transcription, транскрипция: [ /foo/ ]
1. interj. Term of disgust. 2. [very common] Used very generally as a sample name for absolutely anything, esp. programs and files (esp. scratch files). 3. First on the standard list of metasyntactic variable s used in syntax examples. See also bar , baz , qux , quux , corge , grault , garply , waldo , fred , plugh , xyzzy , thud .
When `foo' is used in connection with `bar' it has generally traced to the WWII-era Army slang acronym FUBAR (`Fucked Up Beyond All Repair'), later modified to foobar . Early versions of the Jargon File interpreted this change as a post-war bowdlerization, but it 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.
For, it seems, the word `foo' itself had an immediate prewar history in comic strips and cartoons. The earliest documented uses were in the "Smokey Stover" comic strip popular in the 1930s, which frequently included the word "foo". Bill Holman, the author of the strip, filled it with odd jokes and personal contrivances, including other nonsense phrases such as "Notary Sojac" abd "1506 nix nix". According to the Warner Brothers Cartoon Companion Holman claimed to have found the word "foo" on the bottom of a Chinese figurine. This is plausible; Chinese statuettes often have apotropaic inscriptions, and this may have been the Chinese word `fu' (sometimes transliterated `foo'), which can mean "happiness" when spoken with the proper tone (the lion-dog guardians flanking the steps of many Chinese restaurants are properly called "fu dogs"). English speakers' reception of Holman's `foo' nonsense word was undoubtedly influenced by Yiddish `feh' and English `fooey' and `fool'.
Holman's strip featured a firetruck called the Foomobile that rode on two wheels. The comic strip was tremendously popular in the late 1930s, and legend has it that a manufacturer in Indiana even produced an operable version of Holman's Foomobile. According to the Encyclopedia of American Comics, `Foo' fever swept the U.S., finding its way into popular songs and generating over 500 `Foo Clubs.' The fad left `foo' references embedded in popular culture (including a couple of appearances in Warner Brothers cartoons of 1938-39) but with their origins rapidly forgotten.
One place they are known to have remained live is in the U.S. military during the WWII years. In 1944-45, the term `foo fighters' was in use by radar operators for the kind of mysterious or spurious trace that would later be called a UFO (the older term resurfaced in popular American usage in 1995 via the name of one of the better grunge-rock bands). Informants connected the term to the Smokey Stover strip.
The U.S. and British militaries frequently swapped slang terms during the war (see kluge and kludge for another important example) Period sources reported that `FOO' became a semi-legendary subject of WWII British-army graffiti more or less equivalent to the American Kilroy. Where British troops went, the graffito "FOO was here" or something similar showed up. Several slang dictionaries aver that FOO probably came from Forward Observation Officer, but this (like the contemporaneous "FUBAR")