lumpen \LUM-pen\ (adjective) - 1 : Of or relating to dispossessed people who have been cut off from the social and economic class to which they would normally belong; belonging to the underclass. 2 : Unrefined or unenlightened. (noun) A lumpen person.
"While lumpen investors have been sweating out the recent free fall in global markets, other wealthy investors who hedged their risks have continued to do very well on those same markets."
From German Lumpenproletariat (the lowest section of the proletariat) from Lumpen (rag), from lump (ragamuffin) + French Proletariat (lowest class).