A euphemism for a programming flaw or glitch in a software application discovered only after it's release into the general public.
"Yes, the help desk is aware that creating more than four hundred subdirectories inside a single folder corrupts the file allocation table. That is an 'undocumented feature' which we are closely monitoring at this time".
by dumb ironworker January 18, 2007
Can you define these popular missing words?