A word used by people unable to see reality from a point of view other than the one they were indoctrinated into from childhood. It represents the be-all and end-all arguments that close the case once-and-for-all on further discussion of the issue and makes tin-foil hat wearing buffoons of anyone who refuses to see the logic of their disinformation.
The 50+ murders associated with Bill Clinton have been debunked as urban legend.
A term debunkers use to refer to anything that is impossible for them to accept no matter what irrefutable evidence is presented. To these people the term is synonymous with fraud, lies and is even dangerous to consider other than for the purpose of debunking or to give oneself an imagined sense of superiority to those gullible enough to fall for such outrageous falsehoods.
"We must speak the truth about terror. Let us never tolerate outrageous conspiracy theory (ies) concerning the attacks of September the 11th, malicious lies that attempt to shift the blame away from the terrorists themselves, away from the guilty."
G.W. Bush speaking before the UN General Assembly 11/10/2001
Well-mannered response to an unpersuasive antagonist.
I argued that the 1346ºF temps of the WTC 7 debris pile 5 days after 9/11 (documented by USGS from AVIRIS remote sensing data) could only be generated by thermite or thermate. Especially when NIST acknowledged in their final report of 11/08 that WTC 7 office fires burned out in 20 minutes in any given location. When the "debunker" proceeded to eloquently thank me for being a douchebag fucktard anal scab, I politely decided to quit wasting my keystrokes and agree to disagree.