賊頭賊腦

zéitóuzéinǎo

behaving stealthily like a thief; stealthy; furtive

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zei2 tou2 zei2 nao3

lit. to behave like a thief, furtive, underhand

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賊頭賊腦|贼头贼脑 [zéi tóu zéi nǎo] ► lit. to behave like a thief ► furtive ► underhand