rejam

 rejam  is a repost of a jam.

This Is My Jam
This Is My Jam coined the term "jam" which inspired the jam post type, as well as the term "rejam", which they use to mean "repost a jam", and as one of the webactions buttons in their UI below a post, e.g.:



Screenshot of a jam in stream with "Love", "Share", "Rejam" buttons just below the jam video.