The Collaborative International Dictionary of English v.0.48:

Outlandish \Out*land"ish\, a. [AS. [=u]tlendisc foreign. See
   Out, Land, and -ish.]
   1. Foreign; not native. [archaic]
      [1913 Webster]

            Him did outlandish women cause to sin. --Neh. xiii.
                                                  26.
      [1913 Webster]

            Its barley water and its outlandish wines. --G. W.
                                                  Cable.
      [1913 Webster]

   2. Hence: Deviating conspicuously from common practice;
      strange; freakish; bizarre; rude; barbarous; uncouth;
      clownish; as, an outlandish dress, behavior, or speech; --
      usually used in a negative sense.
      [1913 Webster +PJC]

            Something outlandish, unearthy, or at variance with
            ordinary fashion.                     --Hawthorne.
      [1913 Webster] --Out*land"ish*ly, adv.
      [1913 Webster]

WordNet (r) 3.0 (2006):

outlandishly
    adv 1: in an outlandish manner; "the Bavarian was outlandishly
           dressed in lederhosen"