"You don't respect it, you will get collected."
That's Bone Collector -- the street ball legend who put Floyd Mayweather on his back Monday -- telling TMZ Sports he still can't really believe he crossed up The Best Ever!
"Floyd Mayweather is the richest ankle I've ever collected," Bone tells us.
Of course, Bone's highlight at the $50k Charity Challenge celebrity basketball game has gone super viral ... everyone's praising the only pro athlete to ever drop Mayweather in any sport, EVER!