Gish gallop
Etymology
The tactic is named for creationist Duane Gish, who deployed it against evolutionary biologists in public debates. Anthropologist Eugenie Scott coined the label in the 1990s. "Gallop" captures the breakneck pace that leaves rebuttals hopelessly behind.
noun phrase · /GISH GAL-up/
Overwhelming an opponent with a rapid flood of weak claims that cannot all be answered in the time available.
What it names
Spotting it explains why someone can "win" a debate by volume alone, since each falsehood takes far longer to refute than to assert.
Example
In the debate he rattled off forty dubious statistics in two minutes, a gish gallop no reply could keep up with.
Related idea
The imbalance it exploits is Brandolini’s law — refuting nonsense costs far more effort than producing it.