一颗老鼠屎坏了一锅汤一顆老鼠屎壞了一鍋湯 1.lit. one pellet of rat feces spoiled the whole pot of soup (idiom)2.fig. one bad apple can spoil the whole bunch
(Tw) (slang) don't; must not; won't do (from Taiwanese 毋通, Tai-lo pr. [m̄-thang], similar to Mandarin 不要[bù yào] or 不行[bù xíng])