A suburban, white guy, usually over the age of 30, who lives in a basement apartment. He doesn't have a steady job, can't get a date, and listens to 80's power ballads on his stereo while cooking mac and cheese on a hot plate. Throw a mullet haircut and a possible substance abuse problem and you get the picture. This dude this also known as a basement dweller.
Jack Martin was a typical cellar dweller - no girl, no money, no job, no ambition - just his basement apartment which smelled like mildew, cigarette smoke, and semen.
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 parents home.
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."