Gisele Bundchen -- Caught Pickin' a Wedgie ... It's Still Hot

When in Rome, do Roman stuff -- but when in Brazil, like Gisele Bundchen, pick thongs out of your butt ... and make it look sexy.

The super model was vacationing with her Brazilian fam -- snorkeling, boating, looking hot -- when she suddenly had to take matters in her own hands.

Bundchen's bum is undefeated against thongs, so Gisele had to ...

RELEASE THE KRAKEN!