贼头贼脑

Traditional form:

賊頭賊腦

Pinyin (reading):

zéitóuzéinǎo

Definitions:

• lit. to behave like a thief
• furtive
• underhand

Characters:

• 贼 - thief, traitor; cunning, sly
• 头 - head; chief, boss; first, top
• 贼 - thief, traitor; cunning, sly
• 脑 - brain

Traditional characters:

• 賊 - thief, traitor; cunning, sly
• 頭 - head; chief, boss; first, top
• 賊 - thief, traitor; cunning, sly
• 腦 - brain