Source : Webster's Revised Unabridged Dictionary (1913)

Butter \But"ter\, v. t. [imp. & p. p. {Buttered} (?); p. pr. &
   vb. n. {Buttering}.]
   1. To cover or spread with butter.

            I know what's what. I know on which side My bread is
            buttered.                             --Ford.

   2. To increase, as stakes, at every throw or every game.
      [Cant] --Johnson.