Obnoxiousevan
Thinking you're the smartest, most cunning person in the room, even if you're the only one who shows up.
My dad says he's the smartest man in the world. He showed up to the meeting 20 minutes late.
My brother thinks he's the best at everything. He didn't even know what the question was.
My cousin says she's the most cunning person in the family. She didn't know the rules.