Gauche \Gauche\ (g[=o]sh), n. [F.]
   1. Left handed; hence, awkward; clumsy.
      
[1913 Webster]


   2. (Geom.) Winding; twisted; warped; -- applied to curves and
      surfaces.
      
[1913 Webster]


   3. Lacking grace and perceptivity in social situations;
      crude; tactless; socially inept.

   Syn: graceless; unsophisticated.
        [PJC]

   4. (Chem.) Not planar; -- of molecules or molecular
      conformations.
      [PJC]