Chad Johnson to Floyd & Ronda -- Just Bang Already!!!

Chad Johnson thinks the animosity between Floyd Mayweather and Ronda Rousey is built up sexual tension ... and the only way to diffuse the situation is to hump it out.

After Ronda trashed Mayweather again this week ... saying he's illterate and she makes more cash-per-second than he does ... Johnson decided it was time to weigh in.

"Ronda Rousey & Mayweather might as well date & stop the verbal jabs at each other."