骗饭吃

骗饭吃

Literally means:

earn one's daily bread without making real efforts or by cheating

Actually means:

It means that one has no real ability to do a job or that one makes a living by cheating. It connotes a sense of sarcasm or scorn. It can also be used to show one's modesty or to laugh at oneself. Derogatory.

指从事某项职业或工作的人，没有真正的本事或没有本事而用不正当手段骗人钱财。含讽刺瞧不起的意味。也用来表示自谦或自我嘲笑。具有贬义色彩。