卖命

卖命	mài mìng	to work tirelessly; to give one's all; to slave away / to throw away one's life; to sacrifice oneself (usu. for an unworthy cause)
卖	mài	to sell / to betray / to spare no effort / to show off or flaunt
命	mìng	life / fate / order or command / to assign a name, title etc