What is 3 ninjas knuckle up?

"3 Ninjas Knuckle Up" is a 1995 martial arts comedy film and the third installment in the "3 Ninjas" film series. The movie follows the three young ninja brothers, Rocky, Colt, and Tum Tum, as they visit their Native American grandfather in a small town and become entangled in a battle against a local businesswoman who threatens the town's tribal lands.

Directed by Sang-ok Shin, the film features action-packed fight sequences, humorous moments, and themes of family, friendship, and standing up for what is right. Despite receiving mixed reviews from critics, "3 Ninjas Knuckle Up" has gained a cult following among fans of the martial arts genre.

The movie stars Victor Wong as Grandpa Mori, Michael Treanor as Rocky, Max Elliott Slade as Colt, Chad Power as Tum Tum, and Charles Napier as the main antagonist, Jack Harding. "3 Ninjas Knuckle Up" is known for its entertaining blend of comedy and action, making it a popular choice for fans of martial arts and family-friendly films.