The vicinity of in and around the mouth.
For example: Tom says "Leena don't put your fucking fingers in my mouth space"
The phase beyond dry mouth. When you cannot even form enough spittle for spit. Your mouth is a vacuum from which nothing can escape.
Caused by smoking way to much of the devils lettuce without taking the necessary hydration precautions before sparking up.
Dude we should have brought a bottle of water with us I have aggressive space mouth.