胁肩谄笑 [- jiān chǎn xiào]cringe and smile obsequiously; bow and scrape; flatter sb. by shrugging one's shoulders and smiling; flatter sb., with hunched shoulders and a smiling face; shrug one's shoulders and offer an ingratiating smile; try to win sb.'s favor by servile behavior; smile like a sycophant:
•¶ 他是那种当面胁肩谄笑。背地里造谣中伤的人。 He was the kind of person who would flatter you to your face, and then slander you behind your back.