Ratosphere 

Like the atmosphere surrounding the earth, the ratosphere is the sphere which surrounds under the earth containing lots of rats.

When Boston finished the big dig the homes of millions of rats was displaced, exposing a hole in the ratosphere

Ratosphere by Ratdoctor87 December 9, 2009

ratmosphere 

that dank dusty smell that accompanies the aged excretment of rodents found in a tight space such as a cave, attic, closet, or other place rodents make nests and inhabit.

He ascended into the old attic only to enter into its ratmosphere.

ratmosphere by fishnjim December 30, 2011

Randosphere 

A state of being where you find yourself in an questionable, unfamiliar, area realizing you are surrounded by randos.

The after-party was conducive to the randosphere environment.

I found myself in the randosphere after that Jeffrey Blunt.

Randosphere by PivotalPimp February 11, 2023