Our Little Prince Typhoon Phooey is quite expressive, especially with his disapproving face when his little brother Boom Boom is being noisy.
To truly appreciate the irony of this story, you have to remember how difficult Typhoon has always been. Despite now being six years old (yes, that is really hard to believe), he still has the puppy mentality that the world revolves around him. So when his little brother noisily complains about some injustice, Typhoon is beside himself.
Lots of phrases come to mind here; The pot calling the kettle black for one. Regardless, the Hu-Dad is endlessly amused that Typhoon gets annoyed by immature behavior.