嘴乖

嘴乖	zuǐ guāi	(coll.) to speak in a clever and lovable way
嘴	zuǐ	mouth / beak / nozzle / spout (of teapot etc) / CL:张,个
乖	guāi	(of a child) obedient, well-behaved / clever / shrewd / alert / perverse / contrary to reason / irregular / abnormal