Eattin my lunch
You're ripping off someone's style or ideas and calling it your own, like you're trying to trick everyone and take the credit.
He used my beat and called it his. I'm gonna make him eat my lunch in the studio.
She took my idea for the chorus and said it was hers. I'm gonna roast her in the comments.
He wore my outfit and said it was his. I'm gonna make him look like a dork.