Source : Webster's Revised Unabridged Dictionary (1913)

Misfit \Mis*fit"\, n.
   1. The act or the state of fitting badly; as, a misfit in
      making a coat; a ludicrous misfit.

   2. Something that fits badly, as a garment.

            I saw an uneasy change in Mr. Micawber, which sat
            tightly on him, as if his new duties were a misfit.
                                                  --Dickens.

Source : WordNet®

misfit
     n : someone unable to adapt to their circumstances
     [also: {misfitting}, {misfitted}]