To slander or attack others maliciously, but only to bring harm or disgrace upon oneself; to have one's malicious attempt backfire.
他本想散布谣言诋毁同事，没想到事情败露，最终却是喷血自污，反而让自己名誉受损
He originally intended to spread rumors to discredit his colleague, but the truth came out, and in the end, it backfired, damaging his own reputation.
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