Amiga {guru} (sense 2), where icons of little black-powder bombs
or mushroom clouds are displayed, indicating that the system has
died. On the Mac, this may be accompanied by a decimal (or
occasionally hexadecimal) number indicating what went wrong,
similar to the Amiga {guru meditation} number. {{MS-DOS}}
machines tend to get {locked up} in this situation.

:bondage-and-discipline language: A language (such as Pascal, Ada,
APL, or Prolog) that, though ostensibly general-purpose, is
designed so as to enforce an author's theory of `right
programming' even though said theory is demonstrably inadequate for
systems hacking or even vanilla general-purpose programming. Often
abbreviated `B&D'; thus, one may speak of things "having the
B&D nature". See {{Pascal}}; oppose {languages of choice}.

:bonk/oif: /bonk/, /oyf/ interj. In the {MUD} community, it has
become traditional to express pique or censure by `bonking' the
offending person. There is a convention that one should
acknowledge a bonk by saying `oif!' and a myth to the effect that
failing to do so upsets the cosmic bonk/oif balance, causing much
trouble in the universe. Some MUDs have implemented special
commands for bonking and oifing. See also {talk mode},
{posing}.

:book titles:: There is a tradition in hackerdom of informally
tagging important textbooks and standards documents with the
dominant color of their covers or with some other conspicuous
feature of the cover. Many of these are described in this lexicon
under their own entries. See {Aluminum Book}, {Blue Book},
{Cinderella Book}, {Devil Book}, {Dragon Book}, {Green