Babbangus
Babbangus is a giant baboon who gives you the middle finger and laughs in your face. You use it when someone is being a huge pain in the butt and needs to be called out.
My little brother forgot to do his homework. I texted him: 'You're a babbangus.'
At dinner, my cousin talked over everyone. Mom said, 'You're acting like a babbangus.'
When my friend spilled soda on my shirt, I yelled, 'You're a babbangus!'