1. 
[syn: farfetched, implausible]
The Collaborative International Dictionary of English v.0.48:
Farfetched \Far"fetched`\, a.
   1. Brought from far, or from a remote place.
      [1913 Webster]
            Every remedy contained a multitude of farfetched and
            heterogeneous ingredients.            --Hawthorne.
      [1913 Webster]
   2. Studiously sought; not easily or naturally deduced or
      introduced; forced; strained; hence, implausible or
      improbable.
      [1913 Webster +PJC]
WordNet (r) 3.0 (2006):
farfetched
    adj 1: highly imaginative but unlikely; "a farfetched excuse";
           "an implausible explanation" [syn: farfetched,
           implausible]