Gaggery
Gaggery is when you like something so much you treat it like it’s a best friend. You’ll defend it against all odds and probably get weird if someone doesn't like it.
He got a new video game and now he’s like it's his best friend. I think he’s a gaggery.
She got a new coffee and now she's talking to it like it's her soulmate. That's a gaggery.
This kid got a new pet and now he's talking about it like it's a royal family. He's a gaggery.