John Gotti Jr. -- a guy known as one of the toughest guys ever -- says there's actually one person in the family even tougher than him ... his MMA fighter son, John III.
If you don't know who John Gotti Jr. is then we're assuming you don't know who John Gotti Sr. was ... and to be honest, we're not sure if we can tell you (google it, and let them be the rat).
John Gotti III is an MMA fighter whose first pro bout is May 4th at a Classic Entertainment & Sports show in New York -- and at a recent workout at Powerhouse Gym in NYC said he's got a clear dream opponent.