at second hand
Not from the original source. Are you sure that Susie and Bill are selling their house? I mean, you only heard that at second hand from Anita.
at second hand
Received from some source other than the original. For example, I learned of Mary's divorce at second hand. This phrase may be applied to information or to previously owned merchandise. [1400s] Also see at first hand.
at second hand
by hearsay rather than direct observation or experience.