a. when said confrontationally, "you're done", "get the fuck out of my face", "i'm through with you"
b. said casually, "later", "take care", "bye"
Derived from the crazy Vietnamese soldier in the classic movie, The Deer Hunter, who was yelling "Tse mao!" when forcing De Niro and Walken to play Russian Roulette against each other.
(while throwing a punk out of your house party) "Ting mao, mutha fucka!"