On Tuesday, Steph starred in the "Lil Fish, Big Pond" music vid, which Tobe directed to exclusively accompany the soundtrack of "Stephen Curry: Underrated" ... the documentary about Steph's life and career.

The two-time MVP is cool, calm and collected in his bucket hat while lip-syncing the song's lyrics that define his greatness on the court -- "They know I'm the one/Daddy taught me how to flick my wrist, I'm my father's son/Think I'm pistol-packing, how that ratchet on me like a gun/They should put the basket in a casket after I am done."

Tobe has built a reputation for having colorful visuals and 'Lil Fish' is no exception. It also really allows Steph to revel in his offseason ... he doesn't touch a single basketball in the whole clip!!!

Steph's downtime without b-ball has literally been par for his course this summer ... the sports world is still reeling from the hole-in-one he sank a few weeks back.