adj. very deceased. A word created in homage to Gualtiero Jacopetti, the recently deceased Italian director of Mondo Cane, a movie whose title inspired people who largely didn't speak Italian or Latin to create a variety of parodizing phrases, viz; Mondo Druggo, Mondo Tempo etc.
Want to help me bury my dog?
Is he dead?
Of course he's dead! In fact he's mondo-morto.