Faceious
A person who’s so tiny-minded they think they’re the hero of a sitcom; they get angry about tiny things and make everyone else watch their drama.
He took the last cookie. Now he’s doing a full speech about it in front of the class.
She got a bad haircut. Now she’s telling everyone about it for an hour.
I sat in his spot. Now it’s a full-blown battle in the hallway.