Keeping this in consideration, where does foo bar come from?
The choice of "foo" coupled with "bar" is derived from the coloquial acronym FUBAR (pronounced FOO-bar). Legendarily from the military world, it represents the phrase: "Fucked Up Beyond All Recognition" (in 'mixed company' the first word could be "Fouled").
One may also ask, why do programmers use foo bar? TLDR: Foo, Bar, and Baz are used as placeholders when giving examples in programming. It's like placeholder names that refer to objects or people when telling a story. Such as widget or "John Doe". The actual names are irrelevant and do not affect the message being conveyed.
Thereof, what does foo bar stand for?
Phonetic spelling of FUBAR, which is either an acronym for "Fucked up beyond all recognition", or derived from foo.
What is foo bar in Python?
The terms foobar, foo, bar, and baz, are common placeholder names (also referred to as metasyntactic variables) used in computer programming or computer-related documentation. Foobar is often used alone; foo, bar, and baz are usually used in that order, when multiple entities are needed.