Source : Webster's Revised Unabridged Dictionary (1913)

Boeotian \B[oe]*o"tian\, a. [L. Boeotia, Gr. ?, noted for its
   moist, thick atmosphere, and the dullness and stupidity of
   its inhabitants.]
   Of or pertaining to B[oe]otia; hence, stupid; dull; obtuse.
   -- n. A native of B[oe]otia; also, one who is dull and
   ignorant.

Source : WordNet®

Boeotian
     adj : of or relating to ancient Boeotia or its people or to the
           dialect spoken there in classical times; "Boeotian
           dialects"