Mack Your Back
You punch someone’s back so hard it sounds like a door got slammed and their back is now a punchbag.
Macked my back so hard it felt like I got hit by a truck and my back was a punching bag.
He macked my back like he was mad at me and my back just took it.
She macked my back so hard I think my back is now a new friend: 'Punchy.'