A jitterbug is a type of dance that people used to do a long time ago. It's called a jitterbug because the dancers move their legs and feet really quickly, almost like they're jittery or shaky. The dance is usually done to fast music, and it looks like the dancers are hopping, jumping, and bouncing around.
To do the jitterbug, the dancers have to hold onto each other and move together in sync. The boy usually leads the dance and decides where to go next, and the girl follows his lead. They might spin around, do flips or lifts, or just move around the dance floor together.
Even though the jitterbug was popular a long time ago, some people still enjoy doing it today. It's a fun way to move your body and dance with a partner!