油光水滑

Explanation: ① described as smooth and moist. ② describe the person's smooth, cunning. 　　Source: "The Tale of Heroes" back to the original that the seventh top cupboard, drawer in the back uneasy, did not couch the following boards; that behind the back door in the end wipe Youguangshuihua, such as is often the way out. " 　　Examples: Patrol Road, Fairmont live in this bar Linqing Yamen; for Linqing is where the horse has that class ~ the bachelor, and really 'day high and the emperor far away' know what to fear. ★ "Xingshi" Twelfth Back