manky

adjective mankier or mankiest slang

worthless, rotten, or in bad taste
dirty, filthy, or bad

Word Origin for manky

via Polari from Italian mancare to be lacking
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012