J-kun
A J-kun is a person who spends all their brainpower on making people laugh and then goes nuts. They also can't live without musicals and will yell every word.
She laughed so hard at a musical that she fell out of her chair and broke her ankle.
He yelled the whole of Frozen at his mom and now she won't let him near the house.
He tried to make me laugh so much that I got a headache and failed my test.