Supermarket scanner moment

A supermarket scanner moment is a political gaffe in which a politician is portrayed as out-of-touch with everyday affairs. The term derives from a 1992 New York Times report that characterized sitting U.S. President George H. W. Bush as being amazed by commonplace supermarket barcode scanner technology at a grocers' convention.

Source: Wikipedia — Supermarket scanner moment (CC BY-SA 4.0)