The game played by minors in an attempt to find a twenty-one year old to buy them booze. Rarely successful, however most juvenile delinquents do it at least once in their lifetimes.
Teenager1: "My older sister said she'd be willing to buy for us."
Teenager 2: "I hope she doesn't flake, otherwise we'll have to play the Hey Mister Game."
A cute way of asking the time that distracts someone long enough to be pickpocketed. the source is a ninettenth century childrens playground game particularly popular from the interwar years.