UFC's Brian Ortega Says He'd Destroy 'Iranian Hulk,' Here's How ...

You're looking at "Iranian Hulk" Sajad Gharibi -- a powerlifter who's become a social media sensation -- and he's about to try his hand in MMA.

The good news ... UFC star Brian Ortega is offering up some advice for the massive 27-year-old -- but that advice comes with a serious warning!

Long story short ... Ortega is 100% confident he would destroy Gharibi in a fight -- despite weighing roughly 250 POUNDS less!!!!

"I would just gas him out, piss him off," Ortega tells TMZ Sports.

For the record, Ortega is 5'8", 145 ... Gharibi (from the info we've found) is 6'2", 385.

"Of course, you're gonna see me just get mauled up like a damn little chihuahua in the beginning," Ortega says ... "but just when I ride that wave out, it's a done deal man. He'll gas out and he'll be mine."

Gharibi says he's dead serious about taking a real MMA fight -- telling reporter Chamatkar Sandhu he's already accepted a fight against a Brazilian opponent.