I'm Back, Daddy! - It's when someone goes from being a sad, grumpy, smelly blob

It's when someone goes from being a sad, grumpy, smelly blob to a happy, loud, stinky monster who's ready to take on the world.

I'm back, Daddy! I just got my first paycheck of the year.

I finally beat my brother at Mario Kart. I'm back, Daddy!

After getting kicked out of my house, I came back with a new attitude. I'm back, Daddy!