April 2, 2012
Otiose

o·ti·ose (oh-tee-ose | oʊtioʊs)
Latin 

adjective
superfluous, useless or ineffectual

Most of his otiose rambling went in one ear and out of the other. 

August 12, 2011
opisthenar

opis·the·nar (ah-pes-the-nar | ə-ˈpis-thə-ˌnär)
Greek

noun
The back of the hand

I know you better than my opisthenar.

Submitted by gorgeousinclinations.