The phrase "rhetorical kill shot" means clever persuasion with words that immediately incapacitates the rhetorical opponent.
Sometimes that phrase is simplified to just "kill shot".
The phrase has been used in at least one book sub-title (How Dare You: Inspecting the Rhetorical Kill-shots of America's Most Banned Comedian, Owen Benjamin).
BUT:
Without context and especially when omitting the word "rhetorical", some people are prone to misunderstand and/or misuse the phrase, alleging that "kill shot" was meant as a literal suggestion to kill a person.
Question:
What words or phrases can be used — words/phrases that are just as snappy as "kill shot" — as a synonym or alternative to that phrase?
I mean, "rhetorical kill shot" or "kill shot" is sharp and catchy while "clever persuasion with words" is cumbersome and slow (and doesn't convey the instantaneous effect).