skim 
/ˈskɪm/ verb
skims; skimmed; skim·ming /ˈskɪm/ verb 1 [+ obj] : to remove a layer of something from the surface of a liquid
▪ I skimmed the fat from the broth. = I skimmed the broth to remove the fat. ▪ He skimmed the leaves from the pool. ▪ The cream is skimmed from the milk. ▪ The milk is skimmed before it is bottled. — see also skim milk 2 : to look over or read (something) quickly especially to find the main ideas [+ obj] ▪ She only skimmed the reading assignment. [no obj] ▪ She only skimmed through/over the reading assignment. 3 [+ obj] Brit : to throw (a flat stone) along the surface of water so that it bounces
▪ He is really good at skimming [=(US) skipping] stones. 4 : to move quickly or lightly along, above, or near the surface of something [no obj] ▪ The ducks skimmed across/over the water before landing. [+ obj] ▪ The ducks skimmed the surface of the pond before landing.
▪ I skimmed the fat from the broth. = I skimmed the broth to remove the fat. ▪ He skimmed the leaves from the pool. ▪ The cream is skimmed from the milk. ▪ The milk is skimmed before it is bottled. — see also skim milk
▪ He is really good at skimming [=(US) skipping] stones.
skim off [phrasal verb]
skim off (something) or skim (something) off : to take (something valuable) for yourself out of something else
▪ He skimmed off some of the profits.
▪ He skimmed off some of the profits.
