Jack Osbourne's Ex Cops Plea over Phallic Offense

8/24/2010 4:30 AM PDT
Jack Osbourne's ex-girlfriend -- who allegedly keyed the word "D**K" into Jack's Aston Martin in June -- is now paying the price for the crime ... literally.

TMZ has learned 24-year-old model Niki Cloyd pled no contest to one misdemeanor count of vandalism -- and was ordered to pay for the roughly $10k in damages that were caused to Jack's $250,000 ride.

We're told Niki was also placed on 18 months probation and will have to complete 12 anger management classes ... and if she stays out of trouble while on probation, she'll have her record wiped clean.