nillix

-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."