-noun-
(1) an
unfortunate disaster; or
(2) the
unfortunate actualization of an
otherwise avoidable disaster, caused by the carelessness or stupidity of one person.
(3) a klutz; an ass-hat; a fuck up.
-verb-
(1) to cause a nillix;
(2) to botch, bungle, or fuck up
--Examples--
Chris: "How'd
the game go?"
Justin: "Ugh, it was a total nillix... John
practically handed them
the win."
"Ouch, he really nillixed that shot. The sun must've been in his eyes."