The Collaborative International Dictionary of English v.0.48:

Self-indulgence \Self`-in*dul"gence\, n.
   Indulgence of one's appetites, desires, or inclinations; --
   the opposite of self-restraint, and self-denial.
   [1913 Webster]

WordNet (r) 3.0 (2006):

self-indulgence
    n 1: an inability to resist the gratification of whims and
         desires [syn: indulgence, self-indulgence]
    2: excess in action and immoderate indulgence of bodily
       appetites, especially in passion or indulgence; "the
       intemperance of their language" [syn: intemperance,
       intemperateness, self-indulgence]