Describes mostly older generations (boomers and older) who have difficulties adapting to modern society with its changing values, new technology and younger generations.
Origin:
Borrowed from German "Wellblech-Generation" (literally: corrugated-sheet-generation)
While boomers still tend to name
millennials "
generation Y" (modest reference to themselves),
millennials fought back, and renamed the older generations.
It refers to a parable about the difference between the generations: "While we millennials and younger build real houses, they boomers and older still build theirs with corrugated sheets only."