Allmost any developer should have seen something like the following:
public function bar()
$foo = new Foo();
I was curious to find out what it means and where this foobar thing comes from.
When ‘foo’ is used in connection with ‘bar’ it has generally traced to the WWII-era Army slang acronym FUBAR (‘Fucked Up Beyond All Repair’ or ‘Fucked Up Beyond All Recognition’), later modified to foobar.
Read more stories can be found here in the Jargon File. The Jargon File is meant to be a hackers directory and many interesting information about the life of a hacker can be found there (http://www.catb.org/jargon/html/index.html).
Also if you are a hacker, you may want to consider using the Universal Hacker Emblem on your website or blog.