The Collaborative International Dictionary of English v.0.48:

Facer \Fa"cer\ (f[=a]"s[~e]r), n.
   1. One who faces; one who puts on a false show; a bold-faced
      person. [Obs.]
      [1913 Webster]

            There be no greater talkers, nor boasters, nor
            fasers.                               --Latimer.
      [1913 Webster]

   2. A blow in the face, as in boxing; hence, any severe or
      stunning check or defeat, as in controversy. [Collog.]
      [1913 Webster]

            I should have been a stercoraceous mendicant if I
            had hollowed when I got a facer.      --C. Kingsley.

   3. a serious difficulty with which one is suddenly faced.
      [WordNet sense 1] [obsolescent Briticism]
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

facer
    n 1: (a dated Briticism) a serious difficulty with which one is
         suddenly faced