Pro Skater Keelan Dadd -- GF Lingerie FLASHING at LAX ... UNLEASH THE DRAGON

Pro skater Keelan Dadd’s girlfriend put on a show at LAX yesterday ... FLASHING her man (and the rest of the arrivals) ... by throwing open her robe ... and there wasn't much underneath.

Keelan was doing charity work in the Philippines ... so his GF Sukie decided to give him a hero’s welcome at the gate ... and flashed some sexy red lingerie for the entire crowd to soak in.

Keelan looked pretty shocked ... at one point crashing his luggage cart into the exit door ... but Sukie clearly wasn’t shy ... telling our photog she was just “Unleashing the dragon.”