中英成語俚語800對071：出爾反爾

　　中英成語俚語800對071：出爾反爾

　　出爾反爾

　　Play fast and loose.

　　Blow hot and cold.

　　Go back on one's word.

　　eg：Be true to what you have promised and do not play fast and loose.

　　中英俚語俗語來源：孟子：“戒之戒之，出乎爾者，反乎爾者也。”

　　同義詞：朝令夕改 The law is not the same at morning and night.

　　反義詞：一言為定 A bargain is a bargain.