1. n. The question mark character ("?").
2. interj. What? Also QUES QUES? See WALL.
[invented by Steele. Mythically, from the Latin semi-deponent verb QUUXO, QUUXARE, QUUXANDUM IRI; noun form variously QUUX (plural QUUCES, Anglicized to QUUXES) and QUUXU (genitive plural is QUUXUUM, four U's in seven letters).]
1. Originally, a meta-word like FOO and FOOBAR. Invented by Guy Steele for precisely this purpose when he was young and naive and not yet interacting with the real computing community. Many people invent such words; this one seems simply to have been lucky enough to have spread a little.
2. interj. See FOO; however, denotes very little disgust, and is uttered mostly for the sake of the sound of it.
3. n. Refers to one of four people who went to Boston Latin School and eventually to MIT:
THE GREAT QUUX: Guy L. Steele Jr.
THE LESSER QUUX: David J. Littleboy
THE MEDIOCRE QUUX: Alan P. Swide
THE MICRO QUUX: Sam Lewis
(This taxonomy is said to be similarly applied to three Frankston brothers at MIT.) QUUX, without qualification, usually refers to The Great Quux, who is somewhat infamous for light verse and for the "Crunchly" cartoons.
4. QUUXY: adj. Of or pertaining to a QUUX.