The Collaborative International Dictionary of English v.0.48:

Cupboard \Cup"board\ (k[u^]b"b[~e]rd), n. [Cup + board.]
   1. A board or shelf for cups and dishes. [Obs.] --Bacon.
      [1913 Webster]

   2. A small closet in a room, with shelves to receive cups,
      dishes, food, etc.; hence, any small closet.
      [1913 Webster]

   Cupboard love, interested love, or that which has an eye to
      the cupboard. "A cupboard love is seldom true." --Poor
      Robin. [Colloq.]

   To cry cupboard, to call for food; to express hunger.
      [Colloq.] "My stomach cries cupboard." --W. Irving.
      [1913 Webster]

WordNet (r) 3.0 (2006):

cupboard love
    n 1: a show of affection motivated by selfishness