skim the surface (of something)(redirected from skimmed the surface of something)
skim the surface (of something)
To do, engage with, or understand something to only a minimal or superficial degree. I know you feel like you know everything about philosophy now, but this introductory course only skims the surface. Jack never felt satisfied devoting his time and attention to one thing, so instead he's skimmed the surface of a number of hobbies and interests.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.