Seamus' mother is an Ill Girl (or simply very elderly), and he is looking after her.
It's not that Seamus can't leave the house, hejustwon't.
Seamus' house or apartment burned down, and he had to move back in with his mom...but only until he finds a new place to live.
Inverted:
Seamus O'Taku moved to an apartment of his own on his 18th birthday.
Seamus has his own home, and his mother comes to live with him.
Gender Inverted: Alice still lives with her parents, despite being an adult.
Subverted:
Seamus is away at college.
Seamus is living in a low-rent apartment downtown.
Double Subverted:
But he goes home every weekend.
But then finds he can't make it on his own and moves back in with his parents.
Deconstructed: This is going to be inconvenient for Seamus (who may have a hard time being taken seriously and/or getting a girlfriend) and for his mother (who may still have to provide for him and may not be able to do things she wants to do because he still depends on her.)
Reconstructed: Seamus is saving money, and he also pays rent and otherwise earns his keep there. He is not a burden on his mother, and eventually leaves the nest. He gains skills he needs to survive Out There.
Parodied: Seamus finally gets a girl home and is making out with her on the basement couch. His mom comes down with juice and cookies...and his date leaves in disgust.
Lampshaded: "Be quiet. Mom doesn't like it when I listen to loud music."
Averted: Seamus does not live with his parents.
Enforced: "We need to make Seamus O'Taku a Straw Loser."
Invoked: Seamus loses his job and can no longer afford to pay the rent and bills.
Defied: Seamus doesn't want to move back with his mom. He instead lives off his emergency fund as long as he can while looking for a job, or crashes at a friend's apartment.
Discussed: "I hear Seamus still lives with his mom!"
Conversed: "It's just not right for a man his age to live with his mother..."
Played For Laughs: Seamus is a stereotypical Hollywood Nerd.
