Doornail

Tom backed his car up to check, but the raccoon he had run over was dead as a doornail.

He's dead as a doornail, Tom.

Tom's dead as a doornail.

He was as dead as a doornail.

Tom backed his car up to check, but the raccoon that he'd run over was as dead as a doornail.

The dog on the side of the road was as dead as a doornail.

He's as dead as a doornail.