Boomdowning

Similar to "sundowning" (Def.: 'a neurological phenomenon associated with increased confusion and restlessness in people with delirium or some form of dementia') though instead of a potential dementia or delirium diagnosis, the person is fully cognizant of their behavior and opinions with full agency.

"Rudy Giuliani is claiming that he was criminally assaulted in a grocery store, but everyone concluded that he was actually just boomdowning."