例句：Some people have all the luck! I just heard that my college roommate Freddie is in fat city these days - a rich aunt died and left him 20 million dollars.

　　他说：有些人就是幸运。他刚听说他大学时的室友Freddie的姑姑去世，留给Freddie两千万美元的遗产。

　　Freddie得了那么可观的一笔钱财，如今一定是优哉游哉，尽情享受人生。他说他的前室友is in fat city these days就是这个意思。可见习惯用语in fat city是用来描绘舒适富裕的生活的。