Mad Seamie
Mad Seamie is what you shout when someone acts like they're the most important person in the world. You also say it when someone is so clueless they might forget their own name.
"Mad Seamie! You tried to talk to the dog and it ignored you!", to my dad who thinks the dog is his best friend.
"Mad Seamie! You thought you were famous because the neighbor clapped once!", to my brother who thinks he’s a star.
"Mad Seamie! You tried to build a robot out of Legos and it fell apart!", to my cousin who’s obsessed with robots.