Sham is of the Nyaban Brothers of the Kuroneko Pirates. The Nyaban Brothers are stronger members of the crew, they have cat-like qualities, such as their flexibility or supporting falls from high altitude. In this case the body of Sham is resembled the one of a Siamese cat ("Samu" means Siamese in Japanese). They are armed with claws in their hands that are resembled those of a cat. Their battle style is based on being underestimated by their opponents, for take their opponent by surprise.
Sham gets up close to his opponent then uses fast movements and slight of hand to steal his opponent's weapons or other valuables right. If we read "Neko baba", the meaning of the attack is "cat shit".
Nekoyanagi DaikoushinKanji: ネコ柳大行進
Translation: Grand March of the Puss Willows
Sham and Buchi both charge the opponent and slash wildly with their sharp claws to shred their opponent into human confetti. If we read "Neko Yanagi Daikoushin", the meaning is "Grand March of the Slim Vat".
Thanks to Sham's unusual body shape even if it looks like he's hurt he might in fact be fine, and Sham takes full advantage of this to deceive his enemies and dodge their attacks. The attack can also mean "Cat Stature".