太多了! 最牛英语口头禅 http://bbs.english.sina.com/viewthread.php?tid=1229&extra=page%3D1 but i never hear people call it "pet phrase" in daily speech, maybe more like a "favorite saying?"

我姐姐说：“生活是一杯苦酒“ 我同事说:"做人做饱了“。（并做出欲跳楼状） 我说：“哎“