'Love & Hip Hop: NY' Star Mendeecees Harris -- GUILTY of Slinging Coke & Heroin ... Off to Prison After TV Wedding

GUILTY of Slinging Coke & Heroin

Off to Prison After Wedding

breaking news

0422-mendeeces-lhh-instagram'Love & Hip Hop' couple Mendeecees Harris and Yandy Smith might be honeymooning in a Federal Prison ... because the groom just plead guilty to running a drug ring in upstate NY.

Harris struck a plea deal in the case, and will now face a 8 to 10 years in the federal pen, plus a fine somewhere between $15,000 - $15 million. The feds nailed him for a drug trafficking operation that shipped cocaine and heroin to Rochester for 7 years.

Harris will remain free on bail until his sentencing in August -- good thing for him ... since he and Yandy are getting married next month on "Love & Hip Hop Live: The Wedding." By the way, he also has to surrender all his paychecks from 'LHH.'

The only good news for Yandy -- when her hubby gets locked up ... she'll get back most of the $200k she put up for his bail when he originally got busted last year.