[abbreviation for ?User Brain Damage?] An abbreviation used to close out
trouble reports obviously due to utter cluelessness on the user's part.
Compare pilot error, PEBKAC, ID10T; oppose PBD; see also
The Free On-line Dictionary of Computing (18 March 2015):
User Brain Damage
(UBD) A description (usually abbreviated) used to
close a trouble report obviously due to utter cluelessness on
the user's part. Compare pilot error; opposite: PBD; see
also brain-damaged, PEBCAK.