Lumpenproletariat is a term that was originally coined by Karl Marx to describe the layer of the working class that is unlikely ever to achieve class consciousness and is therefore lost to socially useful production, of no use to the revolutionary struggle, and perhaps even an impediment to the realization of a classless society. The word is derived from the German word Lumpenproletarier, a word literally meaning "miscreant" as well as "rag". The term proletarian was first defined by Marx and Friedrich Engels in The German Ideology (1845) and later elaborated on in other works by Marx. The Marxist Internet Archive writes that "[lumpenproletariat] identifies the class of outcast, degenerated and submerged elements that make up a section of the population of industrial centers" which include "beggars, prostitutes, gangsters, racketeers, swindlers, petty criminals, tramps, chronic unemployed or unemployables, persons who have been cast out by industry, and all sorts of declassed, degraded or degenerated elements." -- Wikipedia.
. . . In the late 1960s, Huey P. Newton and the Black Panther Party came to believe that the lumpenproletariat could have a progressive role. Newton argued that the economic and social system of his time was fundamentally different from that which Marx based his analysis on, saying, "As the ruling circle continue to build their technocracy, more and more of the proletariat will become unemployable, become lumpen, until they have become the popular class, the revolutionary class". This is the class the Black Panther Party sought to organize, he said. Some disregard Newton's interpretation, saying he applied the term to, and sought to organize, the temporarily unemployed, rather than the true lumpen. However, a careful reading of his writings reveals repeated references to the "unemployed" and "unemployable" as those with revolutionary potential.Frantz Fanon also argued in The Wretched of the Earth (1961) that revolutionary movements in colonized countries could not exclude the lumpenproletariat, as it constitutes both a counterrevolutionary and a revolutionary potential. He described the lumpenproletariat as "one of the most spontaneous and the most radically revolutionary forces of a colonized people". However, it is an ignorant and desperate class, particularly susceptible to being co-opted by counterrevolutionary forces. Therefore, he claimed, education of the dispossessed masses should be central to revolutionary strategy. -- Wikipedia.