skim

a thin layer covering the surface of a liquid; "there was a thin skim of oil on the water"

reading or glancing through quickly

travel on the surface of water

move or pass swiftly and lightly over the surface of

examine hastily; "She scanned the newspaper headlines while waiting for the taxi"

cause to skip over a surface; "Skip a stone across the pond"

coat (a liquid) with a layer

remove from the surface; "skim cream from the surface of milk"

read superficially

used of milk and milk products from which the cream has been removed; "yogurt made with skim milk"; "she can drink skimmed milk but should avoid butter"