Someone who was
embarrassed or
emasculated in there childhood who cuts off all ties with family or friends to sit in there dark room using there computer all day,
sometimes not even doing anything and just staring at the screen.
a way you can tell someone is a cheddar goblin is if they have bright pale skin, are really skinny, and sometimes can be a femboy.
the phrase "cheddar goblin" comes from the Nicolaus cage movie "Mandy"