be the armpit of the worldbe the armpit of the world/universe
humorous to be a very unpleasant and often dirty place.
For some people it's an exciting, big city - for others it's the armpit of the universe.
be the armpit of the world
To be a very dirty, foul, or extremely unappealing place. Come on, this place is the armpit of the world—all you can see from your apartment are oil tankers and smoke stacks!