大だいファン

noun

big fan; great fan

Emphatic way to say you are a devoted admirer of a person, group, work, or activity. Common in casual conversation.

• 私わたしはあのバンドの大だいファンです。

  I'm a big fan of that band.

• 彼かれは子こどもの頃ころから野や球きゅうの大だいファンだ。

  He's been a huge baseball fan since he was a kid.