Nicki Minaj Spars With Husband, Uses Unreleased JT Collab As Workout Music

Nicki Minaj's bite just might be as big as her bark on rap tracks -- judging from the hands she's throwing with her sparring partner/husband Kenneth Petty!

"The Pinkprint" rapper shared video evidence of her skills Wednesday, showing off her jab-cross combos and footwork, which all looked pretty convincing.

Nicki never flinched and maintained solid boxing form throughout ... and even finished with a roundhouse kick for good measure.

Y'know what they say about a family that fights together ... don't mess with them!!!

Nicki's workout music was an unreleased collab with JT, and you can hear both dissing rival females who don't stack up to their flyness.

The City Girls rapper was also in the building with Nicki, but didn't break a sweat outside the studio.

Nicki's cooldown wasn't anything to scoff at either ... she backed that thang up on Kenneth and called him Big Daddy!!!