[analogous to ‘pissed off’] Said of system
administrators who have become annoyed, upset, or touchy owing to
suspicions that their sites have been or are going to be victimized by
crackers, or used for inappropriate, technically illegal, or even overtly
criminal activities. For example, having unreadable files in your home
directory called ‘worm’, ‘lockpick’, or
‘goroot’ would probably be an effective (as well as
impressively obvious and stupid) way to get your sysadmin hacked off at
you.
It has been pointed out that there is precedent for this usage in
U.S. Navy slang, in which officers under discipline are sometimes said to
be “in hack” and one may speak of “hacking off the
C.O.”.
