Source : Webster's Revised Unabridged Dictionary (1913)

Sottish \Sot"tish\, a. [From {Sot}.]
   Like a sot; doltish; very foolish; drunken.

         How ignorant are sottish pretenders to astrology!
                                                  --Swift.

   Syn: Dull; stupid; senseless; doltish; infatuate. --
        {Sot"tish*ly}, adv. -- {Sot"tish*ness}, n.

Source : WordNet®

sottishly
     adv : in a sottish manner