has been humping

• 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 hump (3rd person singular).
  hump

  noun

  a rounded protuberance, especially a fleshy protuberance on the back, as that due to abnormal curvature of the spine in humans, or that normally present in certain animals, as the camel or bison.

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