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Open the tool →割臂盟公 (gē bì méng gōng) is a Chinese idiom (chengyu) meaning “to make a solemn pledge or secret engagement”.
割臂盟公 is pronounced gē bì méng gōng in Mandarin Chinese.
Literally, 割臂盟公 means “Cut arm, pledge with duke”. It is used to mean “to make a solemn pledge or secret engagement”.
割臂:刺破胳臂;盟:盟约。原指春秋战国时鲁庄公与孟任割破胳臂,订下婚约。后泛指用割破手臂立誓宁约(指男女秘订婚约)。