"It like trying to milk a dead cow"
Woodie Guthrie

"which means that he was as charming as a dead mouse in a loaf of bread...."

Clive James

"is like a hornet; if you can't kill it dead the first time, better not"
Josh Billings

(How) "long has it been, two weeks? Yeah, he's dead...."
Stewie Griffin

""I just wanna say." Well, you're dead now, so shut up!..."
Monty Python