[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!")