Floyd Mayweather says he doesn't give a DAMN about the Gucci boycott -- telling TMZ Sports no one tells him what to do or what to buy ... and that's why he dropped a FORTUNE at the store last night.
The boxer -- along with his entire TMT crew -- rolled into Gucci in Bev Hills ... and when we told him about all of the stars calling for a Gucci ban over a sweatshirt that resembled blackface, Floyd scoffed.
