油头滑脑

flippant

油的英语翻译：

paint; fat; grease; oil
【化】 oil
【医】 elaeo-; eleo-; oil; Ol; olea; oleo-; oleum

头的英语翻译：

beginning or end; cobbra; conk; crumpet; end; first; garret; hair; head
leading; nob; noddle; pate; sconce; side; top; twopenny
【医】 capita; caput; cephal-; cephalo-; head; kephal-; kephalo-

滑的英语翻译：

slide; slip; slippery; smooth; crafty; cunning

脑的英语翻译：

brain; encephalon; pericranium; cerebrum
【医】 brain; encephalo; encephalon