Source : Webster's Revised Unabridged Dictionary (1913)

Soss \Soss\ (?; 115), v. i. [Cf. {Souse}.]
   To fall at once into a chair or seat; to sit lazily. [Obs.]
   --Swift.

Soss \Soss\, v. t.
   To throw in a negligent or careless manner; to toss. [Obs.]
   --Swift.

Soss \Soss\, n.
   1. A lazy fellow. [Obs.] --Cotgrave.

   2. A heavy fall. [Prov. Eng.] --Hallowell.

Soss \Soss\, n. [See {Sesspol}.]
   Anything dirty or muddy; a dirty puddle. [Prov. Eng.]