A MAN has been arrested after his stepfather was suffocated with his own underwear and struck on the head.

Brad Davis, 33, was arrested and reportedly told Oklahoma police he gave his stepfather, Denver Lee St. Clair, 58, an “atomic wedgie.”

Pottawatomie County Sheriff Mike Booth said he had never heard of “an atomic wedgie,” before Davis told investigators about the incident, Oklahoma's NewsOK reports.

“I'd never seen this before, but when we first looked at our victim seeing the waistband of his underwear was around his neck,” Booth said.

Booth said Davis told investigators that he went to his stepfather's residence and his stepfather “jumped him.”

St. Clair had a head wound and appeared to have been in a fight. The underwear St. Clair was wearing had been pulled up his back and over his head, leaving the waistband around his neck.

Booth said it was the first time he had ever heard of someone being killed by a pair of underwear.

St Clair died on December 21. The cause of death has been determined to be from blunt force trauma to the head and asphyxiation. The death has been ruled a homicide.

Read more at NewsOK