一马勺坏一锅

Traditional (Taiwan): 一馬勺壞一鍋

yīmǎsháohuàiyīguō ㄧ ㄇㄚˇ ㄕㄠˊ ㄏㄨㄞˋ ㄧ ㄍㄨㄛ

    • one ladle (of sth bad) spoils the (whole) pot (idiom)
    • one bad apple spoils the barrel

Character by character

Sources