hair
[back-formation from {hairy}] 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!")