If you will dance on someone's grave, you will outlive or outlast them and will celebrate their demise. Day in the sun
If you have your day in the sun, you get attention and are appreciated. Daylight robbery
If you are overcharged or underpaid, it is a daylight robbery; open, unfair and hard to prevent. Rip-off has a similar meaning. Days are numbered
When someone’s days are numbered, they are expected to die soon. Dead air
When there is a period of total silence, there is dead air.
Dead and buried
If something is dead and buried, it has all long been settled and is not going to be reconsidered. Dead as a doornail
This is used to indicate that something is lifeless.
If people competing are dead even, they are at exactly the same stage or moving at exactly the same speed. Dead from the neck up
Someone who's dead from the neck up is very stupid indeed.
Dead in the water
If something is dead in the water, it isn't going anywhere or making any progress. Dead level best
If you try your dead level best, you try as hard as you possibly could to do something. Dead man walking
A dead man walking is someone who is in great trouble and will certainly get punished, lose their job or position, etc, soon. Dead meat
This is used as a way of threatening someone: You'll be dead meat if you don't go along. Dead men's shoes
If promotion or success requires replacing somebody, then it can only be reached by dead men's shoes' by getting rid of them. Dead right
This means that something or someone is absolutely correct, without doubt. Dead wrong
If someone is dead wrong, they are absolutely in error, absolutely incorrect or of incorrect opinion. Deaf as a post
Someone who is as deaf as a post is unable to hear at all.
Dear John letter
A letter written by a partner explaining why they are ending the relationship is a Dear John letter.
Deep pockets but short arms
Someone who has money but never puts his hand in his pocket...