Skip to content
OneKitly

foo

nounnouninterjectionnounattested in dialogue

  • United Kingdom//fuː//

A metasyntactic variable used to represent an unspecified entity. If part of a series of such entities, it is often the first in the series, and followed immediately by bar.

noun

  1. 1

    Variant of fuhistoricalAlternative form of fu: an administrative subdivision of imperial China; the capital of such divisions.

Etymology

From Mandarin 府 (fǔ).

noun

  1. 1

    A metasyntactic variable used to represent an unspecified entity. If part of a series of such entities, it is often the first in the series, and followed immediately by bar.

    Suppose we have two objects, foo and bar.

  2. 2

    Variant of FooslangAlternative letter-case form of Foo (“placeholder god”).

Etymology

From Chinese 福 (fú, “fortunate; prosperity, good luck”), via its use as 福星 (Fúxīng, “Jupiter”) in Chinese statues of the Three Lucky Stars, picked up from c. 1935 as a nonsense word in Bill Holman's Smokey Stover comic strip, whence it was picked up by Pogo, Looney Tunes, and others. Used by Jack Speer as the name of a mock god of mimeography in the 1930s. Popularized in computing contexts by the Tech Model Railroad Club's 1959 Dictionary of the TMRC Language, which incorporated it into a parody of the Buddhist chant om mani padme hum, possibly under the influence of WWII military slang FUBAR, which had been repopularized by Joseph Heller's Catch-22.

interjection

  1. 1

    Expression of disappointment or disgust.

    Oh foo – the cake burnt!

Etymology

A minced form of fuck.

noun

  1. 1

    Variant of foolslangPronunciation spelling of fool.

    [page 10:] "I knew you'd be scared," Reggie laughed. "What are you doin', foo? You must be crazy. You don't scare me." "Then why did you almost fall out of that chair? I scare everyone." [page 38:] "This is coo," said Fred. "It's almost like being there." "We are there, foo!" said Reggie as the boys slapped palms.

Forms

plural
foos
The neighbouring pagesAlphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.

Lexical content from Wiktionary, under CC BY-SA 4.0 · Source entry · Data version 2026-08-23

Rank among the words of the OpenSubtitles 2018 corpus — film and television subtitles, so spoken rather than written usage (CC BY-SA 3.0).