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.
Before an election, all sorts of rumors fly around.
Much of the information about his resignation is nothing more than idle speculation.
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.