The Brief: "Boomer" is shorthand for a member of the Baby Boomer generation. "Boomers" can be a slang term for psychoactive mushrooms.
The most devastating put-downs, 2019 edition:
I bet you liked the GOT Finale
— Emily Andras (@emtothea) October 30, 2019
So I posted a pic of some dank morel mushrooms on insta and somebody legit messaged me & asked if they were boomers lolol
— conorfortyhandz (@trvphippie) August 8, 2018