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When someone is so mad they hit their head so hard it looks like they’re trying to break their own skull, just like Taemin when he gets roasted.
Why did you tell my crush I’m a fat pig? I’m gonna hit my head until it explodes.
He snitched on me and now I’m gonna bang my head until my brain comes out.
I trusted you and you told my mom I’m a lazy bum. I’m gonna knock my head off.