Obnox
A person who drinks so much, they think they're a superhero and everyone else is just there to cheer them on.
My uncle is an obnox. He drank six beers and tried to dance on the table.
My cousin is an obnox. She drank so much, she started talking to the ceiling.
My friend is an obnox. He drank the whole bottle of soda and then tried to sing opera.