Of or relating to dispossessed, often displaced people who have been cut off from the socioeconomic class with which they would ordinarily be identified: lumpen intellectuals unable to find work in their fields.
Of or relating to the lumpenproletariat.
Vulgar or common; plebeian: "Popular novelists and their mass readership remain a despised lumpen minority"(Leslie Fiedler).
n.
(used with a pl. verb) The lumpenproletariat.
(used with a sing. verb) A member of the lumpenproletariat.
[From German Lumpenproletariat, the lowest section of the proletariat; see lumpenproletariat.]