The Collaborative International Dictionary of English v.0.48:

Souse \Souse\, v. t. [imp. & p. p. Soused; p. pr. & vb. n.
   Sousing.] [Cf. F. saucer to wet with sauce. See Souse
   pickle.]
   1. To steep in pickle; to pickle. "A soused gurnet." --Shak.
      [1913 Webster]

   2. To plunge or immerse in water or any liquid.
      [1913 Webster]

            They soused me over head and ears in water.
                                                  --Addison.
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   3. To drench, as by an immersion; to wet throughly.
      [1913 Webster]

            Although I be well soused in this shower.
                                                  --Gascoigne.
      [1913 Webster]

WordNet (r) 3.0 (2006):

sousing
    n 1: the act of making something completely wet; "he gave it a
         good drenching" [syn: drenching, soaking, souse,
         sousing]