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Lakers star Nick Young was pulled over in Hollywood Monday night -- after cops say he was bumping his music too loud in a rental car ... TMZ Sports has learned.

But during the stop, Young claims the cops took a cheap shot at the Lakers ... though, it's not like they lied.

Here's what we know ... cops say Young was going down the street playing his music too loud -- and didn't have license plates on the car.

He was pulled over by a police vehicle -- and we're told another unit that happened to be close by saw the stop and went over as backup.

Law enforcement tells TMZ Sports Young was cited and went along his way without incident -- but Young claims the didn't leave without taking a parting shot at his team.

"After everything was over one of them (police) going to say (y'all suck) so I replied back like it ain't lookin to good for y'all neither."