strike 'n slap

An advanced sales technique commonly used to exert dominance over a customer who is being an idiot. The salesman will slam his hands down on the table as hard as possible. When the customer looks up in shock to see what happened, the salesman will immediately slap the customer. This lets the customer know you are NOT there to screw around.

This customer is totally unreasonable. I may have to give him the Ole strike 'n slap.