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To be arko'd is to be fingered up the butt or to take it up the butt; literally or figuratively.
Ex.1. "Dude I missed her vag and arko'd the girl."

Ex.2. "I was totally arko'd by that test."
by Bochinko November 26, 2007
The Sun in Bengali.
Arko is on the Rise.
by hjbvhvfbvhadhfsdfuvgiuabfjkf August 11, 2008
the name of someone awsome, expectacular and with really big cajones
Oh my god! that kid is soo awsome, he's definitly an arko!

he nailed that vag, thats arko material
by mysterykid69 March 08, 2008