basement dweller

plural basement dwellers · alternative basement-dweller

1. derogatoryinformalsometimesAn adult who lives in their parents' house (stereotypically in their basement); often with implications of idleness or social awkwardness.

   Over the years, I had shared the square feet of this office space with other basement dwellers, mostly squirrels and rabbits, and unfortunately a few skunks.

   2009, Mary Stuever, The Forester's Log: Musings from the Woods

   1 more example

   Who Do You Hang With — Basement Dwellers or Penthouse Cheerleaders? It's important to take regular inventory of the people you are surrounding yourself with on a fairly consistent basis.

   2014, Nicole R. Matthews, Permission!, page 44

2. InternetbroadlyderogatoryinformalusuallyA nerd or geek; a person lacking a social life.