Ok Bommer 

When you want to tell a person around 40 and up to be quiet, but still being polite.

60-year-old person: When I was your age I read books for fun.
You: Ok Bommer.

Ok Bommer by GuoBroPro December 15, 2019

Ok Boomerer 

A person who commonly roasts boomers for their lacking sense of humor by using the popular slang "ok boomer." These plentiful animals prey most commonly on the screen defiant boomers.

Today I met a savage Ok Boomerer, he roasted Tims grandpa.

Ok Boomerer by a coalition of idiots January 15, 2020

ok boomerang 

When someone taunts you with an already overused “Okay Boomer” and you smile and hit back “Gen X”.

Internet troll poster with limited insults: “OK Boomer”.

You: “Grey haired Gen X’er sorry. OK Boomerang”

ok boomerang by Wjb63 November 23, 2019