Adam "Pacman" Jones has agreed to a plea deal in his casino cheating case that will put him behind bars -- and also ban him from drinking booze for a YEAR AND A HALF ... TMZ Sports has learned.
The 35-year-old was arrested in an Indiana casino last month after authorities say he cheated while playing a table game ... and then went ballistic on officials after he was confronted.
The former NFL star hit with a bevy of charges ... including felony intimidation, felony battery against an officer and several misdemeanors.
But now, Jones has agreed to a plea deal that will send him to jail.