Here's UFC star Paige VanZant and her MMA fighter husband, Austin Vanderford, making the best out of quarantine ... by getting naked and climbing on each other!!

Hey, ya got it? Flaunt it, right?!

Both Paige and Austin have been training their asses off at their Oregon home during the COVID-19 pandemic ... and they've clearly decided the best way to deal with the stress, is to undress!

So, they've basically become nudists in their own home -- they cook naked, the clean naked, the work out naked, they garden naked ... and now they're climbing on each other naked!

Of course, both Paige and Austin are itching for a fight -- Paige recently had her cast removed after suffering a broken arm. She hasn't fought since defeating Rachael Ostovich back in January 2019.

Austin is 9-0 as a pro after locking up another W at Bellator 234 back in November.