The Collaborative International Dictionary of English v.0.48:

Jowl \Jowl\ (joul or j[=o]l), n. [For older chole, chaul, AS.
   ceaft jaw. Cf. Chaps.]
   The cheek; the jaw. [Written also jole, choule, chowle,
   and geoule.]
   [1913 Webster]

   Cheek by jowl, with the cheeks close together; side by
      side; in close proximity. "I will go with thee cheek by
      jole." --Shak. " Sits cheek by jowl." --Dryden.
      [1913 Webster]