The story
From meta- + crap. The "metadata" sense was coined by Canadian-British-American blogger, journalist, and science fiction author Cory Doctorow in 2001.
First known use, by meaning
- from 1992 Metatheory, metanalysis, and other meta disciplines.
- from 2001 Low-quality or unreliable metadata.
Etymology from Wiktionary, CC BY-SA 4.0.