Jameis Winston's troubles keep getting worse ... 'cause the Uber driver he allegedly groped has hit the NFL star with a lawsuit.
In the suit -- filed Tuesday in federal court in Arizona -- the woman claims she picked up Jameis and his friends from a nightclub in Scottsdale. The woman says she overheard someone in the group say, "she is hot. You should sit in the front seat, Jameis."
He did, and she says the ride was a nightmare -- with Jameis acting belligerent, screaming obscenities and racial slurs out the window -- before demanding a burrito.