bandwagoner

From bandwagon +‎ -er.

bandwagoner (plural bandwagoners)

1. Someone who supports or participates in something only because it is popular or successful.
   • 1911, Franklin Hichborn, Story of the Session of the California Legislature of 1911‎, page 21:

     […] a lonely figure was pointed out by a one-time machine follower, whose efforts to get aboard the "bandwagon" were pathetic. "Not a man has spoken to him in two hours," announced the would-be bandwagoner feverishly.

   • 2015 July 8, Jon Caramanica, “Review: On ‘Communion,’ Years & Years Turns the Familiar Into Something of Its Own”, in New York Times‎:

     Accepting the accomplishments on this album of diet club music perhaps requires a suspension of distaste for bandwagoners and carpetbaggers.

• bandwagoneer

• bandwagoning