dead man walking

noun
  1. US a condemned man walking from his prison cell to a place of execution
  2. informal any person in a doomed or untenable situation, esp one about to lose his or her job
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