Dak Prescott Looks Jacked In Topless Pool Pics, Goes IG Official W/ Model GF

It's GREAT to be Dak Prescott ... dude just showed off his shredded bod by the pool Friday -- and just hours earlier, he made things Instagram official with his smokin' hot model GF!!

Oh, and he just signed a 1-year, $31 MILLION deal with the Dallas Cowboys this month!!!

Yeah ... jealous yet?!

Dak was with the Dude Perfect guys for some trick shot work by the pool this week ... and while we're sure the throws were fun -- DO YOU SEE HIS BOD!?

The 6'2", 238-pound QB has clearly avoided the quarantine 15 ... the NFL star (who hasn't always been the most cut-up guy in the league) looks absolutely jacked.

There's abs. There's pecs. And, there's biceps.

Yup, keep droolin', Cowboys fans!!

Of course, Prescott's got some reason to look good shirtless these days ... he just made things social media offish with his longtime rumored GF Natalie Buffett -- and she's STUNNING!!

The model -- who was once a "Barstool Smokeshow" -- posted a happy birthday message for the QB on Wednesday ... and he wrote back, "My girl!!! Thank you" with a heart emoji.