makey-uppy

Irish and Scottish informal adjective for something invented, fabricated, or not based in reality. The reduplicative form gives it a childlike or ironic quality -- it is often used by adults when mocking a story or explanation that is obviously false or fanciful. The register is playfully dismissive rather than harshly accusatory. A good word for gently deflating nonsense without starting a proper argument.

An Irish and Scottish informal adjective meaning made-up, invented, or not based in reality. It's the kind of word a child would coin — and that adults have enthusiastically adopted because nothing else quite captures the same playful scepticism. Calling something makey-uppy implies it has no factual basis and you're calling out the fiction with more affection than aggression. Perfect for calling out tall tales, loose facts, or creative excuses.

(Ireland, and, Scotland) made up, invented.