n. 1. Code that is overly tense and unmaintainable.
"Perl may be a handy program, but if you look at the source, it's complete joe code."
2. Badly written, possibly buggy code. Correspondents wishing to remain anonymous have fingered a particular Joe at the Lawrence Berkeley Laboratory and observed that usage has drifted slightly; the original sobriquet 'Joe code' was intended in sense 1.