The moonwalk or backslide is a dance move in which the performer glides backward but their body actions suggest forward motion. The moonwalk is a popping move. It became popular around the world following Michael Jackson's moonwalk during the performance of "Billie Jean" on Motown 25: Yesterday, Today, Forever, which was broadcast on May 16, 1983, and he included it in tours and live performances.

Source: Wikipedia