soul kiss

from WordNet (r) 3.0 (2006)

soul kiss
    n 1: an openmouthed kiss in which your tongue is inserted into
         the other's mouth [syn: {soul kiss}, {deep kiss}, {French
         kiss}]

from The Collaborative International Dictionary of English v.0.48

soul kiss \soul" kiss`\, n.
   A kiss in which both parties have their mouths open and
   pressed together, and the tongue of one or both is maneuvered
   within the mouth of the other.

   Syn: French kiss, deep kiss.
        [PJC]