Khat fight!
The city’s largest police union is battling an NYPD watchdog group over what constitutes a body cavity search after cops found a man with African drug khat, which can stain a user’s mouth — and ordered him to open up for inspection.
Cops pulled over the 28-year-old driver on McDonald Avenue in Midwood, Brooklyn in October and saw khat, or Bushman’s tea in his car, police sources said.
One officer asked the driver to open his mouth because khat — a plant whose leaves are chewed for its euphoric effects and is illegal — can turn a person’s mouth green or brown…