cocooner means A person who is most comfortable staying at home. Lexicurio rates it Sui generis — a strength score of 90 out of 100.
Etymology
From cocoon + -er.
noun
- A person who is most comfortable staying at home.“Lastly, there is a move among the "cocooners" of the '90s to shopping by computer—ordering groceries with modems for delivery to their front doors.”