Source : Webster's Revised Unabridged Dictionary (1913)

Smouch \Smouch\, v. t. [Akin to smack.]
   To kiss closely. [Obs.] --P. Stubbes.

Smouch \Smouch\, v. t. [See {Smutch}.]
   To smutch; to soil; as, to smouch the face.

Smouch \Smouch\, n.
   A dark soil or stain; a smutch.