Dead'o (noun) (du-ead-oh) Dead'o the action of dieing in a glourious manner, usualy and out right kill, no armours saves, no, not even 2+. If not an instant kill, it is usualy proclaimed at the death of perticularly important character or thing.
This word can also be used after wham'oh. see wham'oh
"ah ha your librarian is deado"
"deado" (while pointing at the landraider thats just been gaussed up real good)