P.F.B.D
A pasty faced basement dweller is a person who thinks the sun is just a light bulb and lives in a moldy hole with no idea what the outside looks like.
'I think the sun is a light bulb. I live in the dark and I’m happy.'
'I have never been outside. I think the sky is just a ceiling.'
'I only know about the world from the internet. I think that’s real.'