LeBron & Cavs -- Large Man Dance Party ... Playoff Turn Up Is Real

Life is good when you're KILLING EVERYONE YOU PLAY ... Just ask LeBron James & the Cavs who are enjoying a little playoff downtime Odell Beckham Jr. style ... basically dancing their asses off.

The whole thing was captured on Richard Jefferson's epic Snapchat ... with Iman Shumpert, Channing Frye, Tristan Thompson, and Jordan McRae all joining the King in a royal celebration.

Unclear what the occasion was ... but let's face it, when you're a gigantic millionaire that gets paid millions of dollars to wear shorts ... you kinda don't need one.