Noun
An intense or confusing dream, often caused by fever.
(by extension) Any intense and vivid experience.
Source: en.wiktionary.orgIf I'm in something that I think is kinda good, it stays with me like a fever dream for a long time afterwards. I don't recall the finished product so much as the feeling of making it. John Cusack
The second Trump Derangement Fever Dream arrived right on time and delivered the usual and predictable outrage of all outrages. Source: Internet