eavesbomber
A person who listens to a conversation and then tries to add their dumb opinion, even though it doesn’t make sense and they just want to be the center of attention.
At the park, I was talking to my friend about the best swing, and my dad walked over and said, 'I used to swing on that when I was a kid, and it broke.'
In the lunchroom, I was telling my friend about my math test, and my teacher showed up and said, 'I’ve failed worse than that.'
During the game, I was talking to my friend about the best player, and my brother said, 'I think I’m better than both of you.'