Flavor Flav -- Cops Say He Was Coked Up in DUI Arrest

Flavor Flav’s DUI is way more alarming that anyone thought, because we've learned he was allegedly under the influence of cocaine ... the drug that almost ruined his life.

Flav was busted back in May for speeding on a Vegas freeway. Cops saw an open Heineken bottle in the center console, and he admitted he had smoked pot "not too long ago." The admission was necessary because the car reeked of weed.

But it got a lot worse when an EMT took his blood at the station ... revealing there was cocaine in his system.

Flav lost his fortune in the '80s after blowing more than $5 million on coke. He said he was spending $2,600 a day for 6 years straight on cocaine.

Very sad.