hacked off
(jargon)(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 victimised 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.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)