What does 'foo' really mean?

Question

I hope this qualifies as a programming question, as in any programming tutorial, you eventually come across \'foo\' in the code examples. (yeah, right?)

what does \'

Answer 1

The sound of the french fou, (like: amour fou) [crazy] written in english, would be foo, wouldn't it. Else furchtbar -> foobar -> foo, bar -> barfoo -> barfuß (barefoot). Just fou. A foot without teeth.

I agree with all, who mentioned it means: nothing interesting, just something, usually needed to complete a statement/expression.