has been jitterbugging

• present perfect progressive

  present perfect progressive

  Used to describe an action that began in the past, has continued continuously, and is still in progress.

  of jitterbug (3rd person singular).
  jitterbug

  noun

  a strenuously acrobatic dance consisting of a few standardized steps augmented by twirls, splits, somersaults, etc., popular especially in the early 1940s and performed chiefly to boogie-woogie and swing.

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