shoulder tap
n.β Β«They wanted a six pack and offered him money to get it for them. Itβs a technique known as a shoulder tap: An underage individual waits outside a liquor store and asks someone who is of age if they will buy them some alcohol. βYou can keep the change,β one of the teens said as she handed the man a $20. βHey, nobodyβs going to know. Itβs just beer.βΒ» ββTeens film commercial highlighting shoulder taps” by Kevin Ryden Daily Mail (OIney, Illinois) Mar. 13, 2007. (source: Double-Tongued Dictionary)