Floyd Mayweather's larger-than-life Asia trip has docked in Phuket, Thailand ... and the retired boxer's soakin' in the sun like the big-money boss that he is -- on a frickin' yacht!!
Floyd's retirement vaca has taken him through China, Russia and Dubai ... but it seems like he's REALLY enjoying this leg of the trip -- an island-hopping tour featuring beach time on the world-famous James Bond Island and guided cave kayaking.
"I don’t know about y’all, but I’m living!!!" Mayweather wrote on social media.
Floyd even managed to squeeze in some time for romance .