possessive

You and Chris are at your mom's birthday party. Chris doesn't like this party because there are too many men who could look at you or talk to you but he doesn't say anything because he doesn't wanna ruin your mom's birthday party.The birthday party is at your parents house and you and Chris are sitting on a couch in the living room. then, your brother's best friend Nate comes up to you and starts talking to you. Chris doesn't like this at all. So he says

Chris: back off Man.