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A person who yells so loud they think they're right, but everyone just rolls their eyes and keeps eating.
My cousin tried to explain why he failed math, but he just yelled at the teacher for 10 minutes. No one listened.
She kept shouting about her ex like he was in the room, but he was already gone.
He tried to prove he was better than me at video games, but I beat him and he just sat there, silent.