出爾反爾 [ㄔㄨ ㄦˇ ㄈㄢˇ ㄦˇ; chu1 er3 fan3 er3] old: to reap the consequences of one's words (idiom, from Mencius); modern: to go back on one's word to blow hot and cold to contradict oneself inconsistent ◄ ►