noun
rumor; gossip; speculation; irresponsible criticism
Originally referred to the talk among people dismounting from horses, i.e., idle chatter. Now used for unfounded rumors, speculative gossip, or armchair criticism, often about public figures or events.
選挙前は様々な下馬評が飛び交う。
Before an election, all sorts of rumors fly around.
彼の辞任については下
Much of the information about his resignation is nothing more than idle speculation.
風評 refers to rumors or reputation circulating in society, often with a negative connotation (e.g., 風評被害). 下馬評 is more about speculative chatter and armchair criticism, not necessarily damaging reputation.
Literally 'dismounting-horse criticism'. Historically referred to the casual talk among people after dismounting from horses, i.e., idle chatter. The exact derivation is uncertain, but the term now means unfounded rumors or speculative gossip.