Look up hang ten in Wiktionary, the free dictionary.
"hang ten" is a nickname for any of several maneuvers used in sports, especially surfing, wherein all ten toes or fingers are used to accomplish the maneuver.
surfing: the surfer stands and hangs all their toes over the nose of the board.[1] Usually this can only be done on a heavy longboard.
Jiu Jitsu: any of a number of grips, chokes, escapes, or maneuvers which involve all toes touching the mat or all ten fingers gripping gi.[citation needed]