Source : Webster's Revised Unabridged Dictionary (1913)

Buss \Buss\ (b[u^]s), v. t. [imp. & p. p. {Bussed} (b[u^]st); p.
   pr. & vb. n. {Bussing}.]
   To kiss; esp. to kiss with a smack, or rudely. ``Nor bussed
   the milking maid.'' --Tennyson.

         Kissing and bussing differ both in this, We buss our
         wantons, but our wives we kiss.          --Herrick.