:hair: [back-formation from {hairy}] n. The complications that
make something hairy. "Decoding {TECO} commands requires a
certain amount of hair." Often seen in the phrase `infinite
hair', which connotes extreme complexity. Also in `hairiferous'
(tending to promote hair growth): "GNUMACS elisp encourages lusers
to write complex editing modes." "Yeah, it's pretty hairiferous
all right." (or just: "Hair squared!")
-- The AI Hackers Dictionary
