presenteeism

[prez-uh n-tee-iz-uh m]
noun
  1. the practice of coming to work despite illness, injury, anxiety, etc., often resulting in reduced productivity.
  2. the practice of working long hours at a job without the real need to do so.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for presenteeism

presenteeism

noun
  1. the practice of persistently working longer hours and taking fewer holidays than the terms of one's employment demand, esp as a result of fear of losing one's job

Word Origin for presenteeism

C20: a play on absenteeism
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