Not being around very many young people, this phrase was new to me just this week, even though it’s been around for a while.
It’s the latest way for Millennials to dismiss the opinions and wisdom of the older generation, and close off all conversation with a mindless slogan.
According to Wikipedia, the phrase “OK Boomer” is a pejorative retort and ageist catchphrase used to dismiss or mock perceived narrow-minded, outdated, negatively judgemental, or condescending attitudes of older people, particularly baby boomers.
You know, all the stuff that’s been true forever, which they have arbitrarily decided isn’t anymore. They know better.
The Red Guard in Maoist China and the infamous Hitler Youth also had the sublime confidence of youth.