nail the hammer on the head

another nail in someone's coffin

An event that increases the likelihood of or causes further failure.

bang one's head against a brick wall

To waste effort on a futile project.

bash someone's head

To beat up someone violently.

big head

An inflated ego, an exaggerated belief in one's own importance.

bite someone's head off

To severely berate someone.

blow someone's head off

To shoot someone in the head.

bring down the hammer

To treat very harshly.

bring to the hammer

To put up for sale by auction.