wéi​fǎ​zì​bì

hoist on one's own petard

为法自弊 為法自弊 wéi​fǎ​zì​bì
hoist on one's own petard
To suffer from the consequences of one's own laws or schemes; to be harmed by the very rules one established. Used to describe a situation where someone is caught in their own trap, similar to 自作自受 zì​zuò​zì​shòu.

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