A rogue NYPD cop-turned-drug pusher yesterday was busted for allegedly trying to arrange to buy a weekly, $40,000 stash of the rave drug “Special K” to peddle, police sources said.

Officer Kifah Othman, who lives on Staten Island and works out of Brooklyn’s 68th Precinct, was arraigned in Manhattan federal court on narcotics-trafficking charges.

He was released on $250,000 bail.

Othman, 40, was caught on wire trying to orchestrate the weekly buy, the sources said, although there’s no indication he actually made any purchase.

He was arrested at his home in the Graniteville section.

Special K is the street name for the pet tranquilizer ketamine, a powerful anesthetic that produces hallucinations.

It’s gained popularity at teenage rave parties.