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A sneaky butt who listens to secrets and keeps them for later use. They’re like a human vault, but they use the info to make others look like fools.
He heard the boss’s plan and told me before the meeting. I looked like a genius, and he looked like a backstabbing donkey.
She listened to my crush’s conversation and told me he had a crush on me. I was confused, and he was confused.
He overheard the teacher’s password and used it to log in during class. The teacher was mad, and I was laughing.