A COUPLE BACK SMACKERS - The kind of people who would fight over a single slap to the

The kind of people who would fight over a single slap to the back.

My cousin and his friend are a couple back smackers because they argue about who slapped who first.

My dad and his brother are a couple back smackers because they slap each other every time they meet.

My teacher and her aide are a couple back smackers because they slap each other during class.