From The Free On-line Dictionary of Computing (8 July 2008) [foldoc]:
Bastard Operator From Hell
BOFH
<humour> (BOFH) A rogue network operator character invented
by Simon Travaglia <simontrav@hotmail.com>, regularly featured
in "Computing" and "DATAMATION" magazine.
See also: Dilbert.
{(http://angelfire.com/bc/simont/index.html)}.
(1999-09-17)
From Jargon File (4.4.4, 14 Aug 2003) [jargon]:
BOFH
//, n.
[common] Acronym, Bastard Operator From Hell. A system administrator
with absolutely no tolerance for lusers. "You say you need more
filespace? <massive-global-delete> Seems to me you have plenty
left..." Many BOFHs (and others who would be BOFHs if they could get
away with it) hang out in the newsgroup alt.sysadmin.recovery,
although there has also been created a top-level newsgroup hierarchy
(bofh.*) of their own.
Several people have written stories about BOFHs. The set usually
considered canonical is by Simon Travaglia and may be found at the
Bastard Home Page. BOFHs and BOFH wannabes hang out on {scary devil
monastery} and wield LARTs.