What is the name of the fandom that even muggles know well?

I’m curious

1. ARMY

2. Muggles even know the name of the fandom?

3. What do Muggles know about fandom names?

4. Is there anyone else besides ARMY..?

5. ARMY is really famous

6. ARMY??? It reminds me of Cassiopeia

7. ARMY is famous for appearing a lot in the news

8. My father also knows ARMY

9. ARMY, VIP..?

10. 2nd generation fandoms + ARMY?

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