The Collaborative International Dictionary of English v.0.48:

Bib \Bib\, Bibbe \Bibbe\, v. t. [L. bibere. See Beverage, and
   cf. Imbibe.]
   To drink; to tipple. [Obs.]
   [1913 Webster]

         This miller hath . . . bibbed ale.       --Chaucer.
   [1913 Webster]