The art of "wahooing" beer/liquor is practiced by underage individuals who carry the alcohol in question up to the cashier, throw a substantial amount of currency on the counter that is well in excess of the sticker price of the alcohol in question, and run out the door. E.g., $20 for a 12-pack. The idea being, the store or cashier gets to pocket some "hush money" not to pursue the issue.