lower class

lower class
lower classes
N-COUNT-COLL: usu pl
Some people use the lower class or the lower classes to refer to the division of society that they consider to have the lowest social status.

Education now offers the lower classes access to job opportunities...

The black middle class must now reach out with more empathy and concern to the lower class.

Lower class is also an adjective.

...lower-class families... Horse-racing was once considered vulgar and lower class in Japan.

English dictionary. 2008.