In the
fantasy novels of
Rick Cook, a special type of "
assembly language"
instruction in the
WIZ-DOS magic compiler system which produced
indeterminate results. The
acronym means "I'll Do As I Damn Well Please," by analogy with
DWIM. These
instructions tended to do different things each time they were used, which made them hard to work with. It was
theorized by
Jerry Andrews that they represented a sort of
quantum uncertainty effect on a
macro level. One of these instructions made it into a
beta copy of the
spell compiler, because it worked
reliably except for about one time in a hundred, but was left out of the
production version.
E.T. Tajikawa did further research on the IDAIDWP instructions, dividing them into two categories, "regular IDAIDWP" and "FU-IDAIDWP." He described the latter category as "IDAIDWP with an attitude." (The meaning of the extra two letters in the acronym should be obvious.) He made use of the FU-IDAIDWP instructions in a magical weapon used to destroy the strange artificial life entity that menaced the Wizard's Keep and had stolen Moira's body.
Source: Rick Cook, The Wizardry Quested