What does Armpit of Indiana mean?

Armpit of Indiana meaning in Urban Dictionary

Hammond, Indiana.Drive through and discover all derelict production facilities and boarded-up companies. There is a slow train that goes through that will end traffic for rather awhile. Jobless appears large, but residential property values tend to be down. Buy the movie theatre in the city for only $40K. Go Hammond!! Be careful, they've aware cops on a search for from state plates.