Nadji Jeter Arrested -- 'Grown Ups' Star Busted for For Allegedly Driving High

"Grown Ups" star Nadji Jeter was arrested Saturday night in Burbank after he was caught driving like a maniac ... and cops believe he was under the influence of drugs.

Jeter was pulled over around 7:40 PM after cops say he was driving aggressively while weaving in and out of traffic ... and when they approached the vehicle, officers caught a whiff of grass.

We're told the actor performed poorly on more than one field sobriety test ... and was arrested on suspicion of driving under the influence of drugs.

He's still behind bars.