0 Old HSK word(s):
油头滑脑* *

Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.

油 oil, fat, grease, lard / paints
头 head / top / chief, first / boss
滑 slip, slide / slippery, polished
脑 brain
Hsk Characters:
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual