ミリタリーオタク

noun

military nerd; war nerd

Slang term for someone deeply obsessed with military topics, equipment, or history, often to a geeky degree.

• 彼かれはミリタリーオタクで、戦せん車しゃの名な前まえを全ぜん部ぶ言いえる。

  He's a military nerd and can name every tank.