Le'Veon Bell is sending a message to his haters ... the only thing about him that's fat is his pockets.
During the offseason, Bell took a lot of heat from critics who say he looked overweight since missing the 2018 NFL season. He was often spotted on jet skis and at nightclubs ... not so much on the field or in the gym.
But, he looks pretty damn good now ... flexing his toned, ripped abs in a new music video.
The song features the NY Jets star running back bragging about his money -- and telling the haters to get off his ass.