• (British) IPA: /fuː/

foo (plural foos)

  1. (historical, obsolete) Alternative form of fu#English|fu: an administrative subdivision of imperial China; the capital of such divisions.

foo (uncountable)

  1. (programming) 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. (fandom slang) Alternative letter-case form of Foo#English|Foo (“placeholder god”)
Related terms Interjection
  1. Expression of disappointment or disgust.
    Oh foo – the cake burnt!
Synonyms Noun

foo (plural foos)

  1. (slang) Eye dialect spelling of fool#English|fool.

Proper noun
  1. (dated, fandom slang, jocular) A mock deity of early science fiction fandom; a fannish ghod.

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