The Gish gallop is a rhetorical technique in which a person in a debate attempts to overwhelm an opponent by presenting an excessive number of arguments, with no regard for their accuracy or strength, with a rapidity that makes it impossible for the opponent to address them in the time available.
[1] During a typical Gish gallop, the galloper confronts an opponent with a rapid series of specious arguments, half-truths, misrepresentations and outright lies, making it impossible for the opponent to refute all of them within the format of the debate.
[2] Each point raised by the Gish galloper takes considerably longer to refute than to assert.
The technique wastes an opponent's time and may cast doubt on the opponent's debating ability for an audience unfamiliar with the technique, especially if no independent fact-checking is involved, or if the audience has limited knowledge of the topics.
[3] The difference in effort between making claims and refuting them is known as Brandolini's law[4] or informally "the bullshit asymmetry principle".