有奶便是娘 [yǒu nǎi biàn shì niáng]
1 比喻贪利忘义,谁给好处就投靠谁。
英 obey any one who feeds him; whoever suckles me is my mother;
1 比喻只要有好处,就可以不讲原则。
1 比喻趋利附势,谁能给好处即愿听从,为之效劳。
英语 lit. whoever provides milk is your mother (idiom), fig. to follow whoever is feeding you, to put one's loyalties where one's interests lie