1. Noun

   dregs; sediment; grounds; meal

   Usually written using kana alone

2. lees (esp. sake)

   Usually written using kana aloneoften 粕

3. leftovers; by-product

   Usually written using kana alone

4. worthless item; junk

   Usually written using kana alone

5. dregs (e.g. of society); scum; dross

   Usually written using kana alone

6. 1-point card

   HanafudaUsually written using kana alonesee カス札

Also written 粕【かす】kasu、糟【かす】kasu