- The lowest stratum of the proletariat. Used originally in Marxist theory to describe those members of the proletariat, especially criminals, vagrants, and the unemployed, who lacked awareness of their collective interest as an oppressed class.
- An underclass.
Origin of lumpenproletariatGerman : Lumpen, pl. of Lump, ragamuffin (from Middle High German lumpe, rag) + Proletariat, proletariat (from French prolétariat; see proletariat).