(Presumably a play on "ef="module.php?name=Lexikon&file=search&eid=1&query=nanosecond">nanosecond") The miniscule time it takes to realize that you' ve just made a BIG mistake like typing rm -rf * in the wrong directory. Seen in elizabeth P. Crowe' s book, "Theelectronic Traveller." (1998-08-27)