The Collaborative International Dictionary of English v.0.48:

Mawkishness \Mawk"ish*ness\, n.
   The quality or state of being mawkish. --J. H. Newman.
   [1913 Webster]

WordNet (r) 3.0 (2006):

mawkishness
    n 1: insincere pathos [syn: mawkishness, bathos]
    2: falsely emotional in a maudlin way [syn: mawkishness,
       sentimentality, drippiness, mushiness, soupiness,
       sloppiness]