presenteeismpres‧en‧tee‧is‧m /ˌprezənˈtiːɪzəm/ noun [uncountable] 
a situation when people spend a lot of time at work, even if they are ill or could take a holiday, because they want their employers to see that they are working very hard
a situation when people spend a lot of time at work, even if they are ill or could take a holiday, because they want their employers to see that they are working very hard