The Collaborative International Dictionary of English v.0.48:

Malinger \Ma*lin"ger\, v. i. [imp. & p. p. MAlingered; p. pr.
   & vb. n. Malingering.]
   To act the part of a malingerer; to feign illness or
   inability.
   [1913 Webster]

WordNet (r) 3.0 (2006):

malinger
    v 1: avoid responsibilities and duties, e.g., by pretending to
         be ill [syn: malinger, skulk]