I'm taking dead aim on this:
dead letter
dead weight
dead certain
dead loss
dead as a dodo
as good as dead
better off dead
dead and buried
dead from the neck up
dead in the water
dead to the world
better dead than red
come back from the dead
dead ahead
dead and buried
dead as a dodo
dead asleep
dead beat
dead broke
dead center
dead certain
dead drunk
dead giveaway
dead in one's tracks
dead in the water
dead letter
dead men tell no tales
dead of night
dead of winter
dead on
dead president
dead serious
dead set against
dead wood
drop-dead gorgeous
my cold, dead hands
knock 'em dead
never speak ill of the dead
play dead
rise from the dead
to wake the dead
would not be caught dead
and that is my dead last guess.