2 buddy. One being the classic Ka Mate (pronounced 'Ka Ma-ti' not as in Ka 'm8') And Kapa o Pango wich is the one right here. Me personally (not being Maori) don't know a whole lot about the meaning behind them, except that they're a challenge to the opponent and if you show your back, well, prepare to get thrashed! (Italy lol). You should search around on Youtube and/or Google. :)