Source : Webster's Revised Unabridged Dictionary (1913)

Discoast \Dis*coast"\, v. i. [Pref. dis- + coast: cf. It.
   discostare.]
   To depart; to quit the coast (that is, the side or border) of
   anything; to be separated. [Obs.]

         As far as heaven and earth discoasted lie. --G.
                                                  Fletcher.

         To discoast from the plain and simple way of speech.
                                                  --Barrow.