Now we know Priyanka Chopra is the super affectionate type when she's around her BFF, Adriana Lima, on the beach ... and ya can't blame her!

The gorgeous "Quantico" star couldn't keep her hands off the Brazilian supermodel during some serious gal paling Friday on Miami's South Beach. Adriana flaunted her tiny black string bikini, while Priyanka covered up a little more.

Still, she couldn't resist getting all over Adriana while they frolicked -- 'cause that's what smoking hot girlfriends in swimwear do.