Muselmann – especially weakened concentration camp prisoners
The psychologist and Auschwitz survivor Viktor Frankl, in his book Man's Search for Meaning, provides the example of a prisoner who decides to use up his last cigarettes (used as currency in the concentration camps) in the evening because he is convinced he won't survive the Appell (roll call assembly) the next morning; his fellow captives derided him as a Muselmann.
If a camp did not have a gas chamber of its own, the so-called Muselmänner, or prisoners who were too sick to work, were often killed or transferred to other concentration camps for extermination.