butter

noun

1. the solid, yellowish, edible fat that results from churning cream or whole milk, used as a spread, in cooking, etc.
2. any of various substances somewhat like butter; specif.,
   1. any of certain other spreads for bread: apple butter, peanut butter
   2. any of certain vegetables oils having a solid consistency at ordinary temperatures: cocoa butter
   3. any of certain metallic chlorides: butter of antimony
3. Informal flatter

transitive verb

1. to spread with butter
2. Informal to flatter so as to ingratiate oneself: often with up