An inhabitant or permanent resident of a room or group of rooms below the ground level and usually under a building often a relative or child turned adult that refuses to leave the parentshome.
After seeing the empty pantry, refrigerator and the recent electric bill Dad turned to Mom and said, " This is outrageous, tell cellar-dweller he needs to get a job and pay room and board we cannot afford him anymore."
The area of the workforce that women don't want to be part of, such as digging, road construction, garbage dumping, etc. as oppose to glass ceiling jobs such as, being CEO, chairman, congressman, president, and all that good stuff. Due to political correctness, it's harder for men to get most medium paying jobs, so some are stuck under the glass cellar. basically men dominate both extremes of the spectrum.
They put more cracks in the glass ceiling than they did in the glass cellar.
When a person feels like everyone decided to hate them all at once because no matter who they call or text, no one will respond. Generally this is followed by the person calling every single contact in their phonebook, in order to alleviate the condition. Some will also call others off a different person's phone, to see if they are actually being ignored.
Marry had a horrible case of Cellular Paranoia; she called everyone she knew from a payphone to see if they would answer.