Foo Definition
noun
(computing) 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.
Wiktionary
(slang) Fool, foolish person.
Wiktionary
(slang) Alternative spelling of foo (short form of fool)
Wiktionary
interjection
Expression of disappointment or disgust.
Oh foo - the cake burnt!
Wiktionary
Origin of Foo
Circa 1935 as nonsense word, circa 1960 in programming sense.
From Wiktionary
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Abbreviation of fool (“foolish person").
From Wiktionary
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From Wiktionary
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