Jennifer Lopez is being sued by her former personal driver ... who claims the singer's powerful manager Benny Medina HUMILIATED him ... and destroyed his career.
According to the lawsuit obtained by TMZ, Hakob Manoukian claims he started driving for J.Lo and Marc Anthony in 2005 ... and over time they loved him so much, they convinced him to shut down his company and work exclusively as her personal Head of Security and Transportation.
Hakob claims J.Lo agreed to pay him more than $200,000 per year.
But according to the suit, things went south when Lopez began filming "What to Expect When You're Expecting" in 2011 ... that's when Hakob claims he was forced to spend time with Benny Medina.
Hakob -- who was born in Iraq -- says Medina hated his guts from the start ... claiming Benny would often rip him for the way he dressed, cussed him out in public and told him "he could not speak English well enough."
Hakob claims Medina eventually persuaded Lopez to demote him ... taking away his security responsibilities .... and relegating him to "merely be Lopez's Los Angeles driver."
Hakob says he was basically forced to resign -- and now he's suing J.Lo and Benny for unspecified damages.
Medina tells TMZ, Manoukian was a "disgruntled employee who chose to quit."
Our call to Lopez has not been returned.