Galiba
A Galiba is someone who is always the best. They're never wrong, and if they are, they'll make sure everyone knows it. They're super polite but also super loud when they're mad.
My teacher said I'm a Galiba because I always win at spelling bee.
The Galiba at the restaurant yelled at the waiter for bringing the wrong drink.
My dad is a Galiba. He won the lottery and still bragged about it for weeks.