Overcrowded underground Synonyms

Overcrowded replaced

Synonyms for phrase

OU abbreviation

OU is an abbreviation for Overcrowded Underground
What does OU stand for?
OU stands for "Overcrowded Underground"

Definitions for Underground


  • (adjective) undertaken or done so as to escape being observed or known by others
  • (adjective) being, situated, or operating beneath the surface of the earth
  • (noun) a secret organization in a conquered country fighting against enemy forces