Maori "let’s DANCE!" challenge and pregamer of the New Zealand All Blacks

noun

1. A traditional Maori dance that is typically performed in a group and involves rhythmic usually vigorous movements (such as foot stamping, body slapping, and swaying), intimidating postures and facial expressions, and loud chanting and that is expressive especially of pride, strength, and unity

   "… the Maoris fall in with 200 other shirtless men and begin the haka. They shout, roll their eyes, stick out their tongues as far as they will stretch and make threatening gestures at an unseen foe."