梁上君子

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❶ 窃贼的代称，例昨夜疏忽未锁前门，致使梁上君子乘机而入，幸亏损失不大。

The main door was left unlocked last night and a burglar got in，but fortunately he did not make off with much．

❷ 也比喻脱离实际的人，例这位研究员真是个梁上君子，他所研究的问题常与实际需求相距甚远。

This researcher is a person dworced lrom reality and his research deals with subjects also far divorced from reality．