Bill Belichick's always about supporting his team ... and, it seems he's taking that quite literally in his relationship -- holding up his girlfriend Jordon Hudson in an impressive acrobatic maneuver on the beach.

Hudson shared several photos from an idyllic beach location with the Super Bowl-winning coach ... and, ya gotta see them for yourself -- Bill's got her high up in the air on his feet.

The former cheerleader hits a series of different poses ... showing a ton of trust in her partner by throwing out her hands in a Superman-like pose in one while she uses his hands for support and contorts her body into a 90-degree angle in another.

JH captioned the post, "☀️ #SpringBreak #UsTime #StillGotIt