A sudden compression of the air in the mouth,
   simultaneously with and affecting the sound made by the closure of the
   organs in uttering p, t, or k, at the end of a syllable (see Guide to
   Pronunciation, //159, 189); also, a similar compression made by an
   upward thrust of the larynx without any accompanying explosive action,
   as in the peculiar sound of b, d, and g, heard in Southern Germany.