Mack Your Back
You slap someone’s back so fast it feels like you just gave them a surprise party with your fist.
Macked my back so fast I thought my shirt was gonna rip and my back was screaming.
He macked my back like he was trying to wake me up from a nap and I was still dreaming.
She macked my back so hard I think I got a new nickname: 'The Back Whisperer.'