Why was "tantrum" trending last week?
(UK) A wannabee or early larval stage hacker who spends most of his or her time wandering the directory tree and writing noddy programs just to get a fix of computer time. Variants include "terminal jockey", "console junkie", and console jockey. The term "console jockey" seems to imply more expertise than the other three (possibly because of the exalted status of the console relative to an ordinary terminal).
See also twink, read-only user.