Bare Knuckle Fighting Championship star Luis Palomino has an idea for his next opponent ... Hall of Fame boxer Floyd Mayweather.
TMZ Sports spoke with the former MMA fighter ... who tells us he's tired of BKFC guys seemingly ducking him -- and his sights are now set on boxing the 50-0 legend.
"I've called out several names in the BKFC and crickets," Palomino said. "I called out Chad Mendes in three consecutive fights when they signed him, and I heard nothing."
"I'm looking for the big money fight," Luis continued.