Joakim Noah Shows Off Shredded Beach Bod With Josh Brolin and John McEnroe

Thanos ain't snappin' his fingers at Joakim Noah ... 'cause the NBA star and Josh Brolin bro'd out on the beach ... and lookin' at the pics, you'd think Noah is the one who plays a superhuman!!

The buff dudes teamed up for a Malibu getaway with John McEnroe and surfer Laird Hamilton this week ... drinkin' beers and playing cornhole -- something they've been doing all summer long.

Noah's actually wearing a lot more clothing than the last time we saw him ... considering the dude stripped buck nekkid in front of his expensive Porsche in Santa Monica for a quick change last month.

No clue how this group came to be ... but if they keep taking beach pics together, we're for it.