Yes, skim is a Scrabble word!
...and is worth 10 points in Scrabble, and 11 points in Words with Friends
skim
Verb
1. Travel on the surface of water
2. Move or pass swiftly and lightly over the surface of
3. Examine hastily
4. Cause to skip over a surface
5. Coat (a liquid) with a layer
6. Remove from the surface
7. Read superficially
Adjective
1. Used of milk and milk products from which the cream has been removed
Noun
1. A thin layer covering the surface of a liquid
2. Reading or glancing through quickly
What Scrabble words can I make with the letters in skim?
3 Letter Words
2 Letter Words