butter someone up
a small knife with a wide, flat blade, as for spreading butter on bread or rolls.
noun (Canadian) a kind of tart made with butter, brown sugar, and raisins
any of several tropical trees of the sapodilla family, having seeds that yield a butterlike oil. Historical Examples The New Paul and Virginia W. H. Mallock
any wild plant having conspicuously yellow flowers or leaves. the horseweed. a ragwort (Senecio jacobaea) or groundsel (S. vulgaris), both having yellow ray flowers.