Sometimes a phrase hits the zeitgeist so squarely that it becomes the mantra of a generation. For mine, it was “don’t trust anyone over 30.” For the Millennials, it seems to be “OK, Boomer.”

Twice within the last two days I’ve heard or read about “OK, boomer,” the dismissive reply young people make to “olds” who don’t get (fill in the blank) climate change, student debt or how to rotate a PDF.  The phrase lit up the Twitterverse, the editorial pages and will be featured on a radio show I occasionally listen to. There are retorts and retorts of retorts.

Here’s how millennial Morgan Sung ends a Mashable essay on the topic: “Saying ‘OK, Boomer’ now is even funnier because of how pressed the Boomers get. And you know what we say to that? OK, Boomer.”

If I’m aware of something like this, I figure it’s probably on the way out. But just in case it isn’t, I will refrain from generational preaching. Because that would just be playing into their hands, you know.