Sliding is the unauthorized discounting of merchandise at a register in any retail establishment. The most common form of sliding is simply the swiping of a product past the barcode reader without turning the barcoded side towards the reader, effectively keeping the product from being registered.

The practice of sliding can be observed with younger employees who are giving their friends "a hand". Sometimes for purposes of alcoholic beverage acquisition. Other examples would be employees who help out family members by reducing the price of items (faking coupons).

Sliding is considered illegal and can lead to discharge and/or criminal prosecution of an employee, especially when sliding is used to give minors access to alcoholic beverages.