Okay kiddo, so sometimes people use a word called "goy" and it comes from a language called Yiddish, which is kind of like a mix of Hebrew and German.
This word means someone who is not Jewish. It's kind of like saying you're part of one club and someone else is not part of that club.
But it's important to remember that just because someone is not part of the same club as you, it doesn't mean they are any better or worse than you. We should always treat everyone with kindness and respect, no matter what group they may or may not belong to.