underclass

English Thesaurus

1. the social class lowest in the social hierarchy (noun.group)

hypernym	:	class, social class, socio-economic class, stratum,
definition	:	people having the same social, economic, or educational status (noun.group)

2. belonging to the lowest and least privileged social stratum (adj.all)

similar	:	underprivileged,
definition	:	lacking the rights and advantages of other members of society (adj.all)