When something that happened a while ago, is brought up over and over again (even if it's not funny) until the person who is talking gets acknowledged. It can also be a form of making excuses for something you are bad at.
“Am I Karening right now?”
”You were Karening pretty hard.”
If we’re all Karening each other we will never get along. Nobody’s perfect, we all fall short. Be cool. Give the benefit of the doubt - and catch yourself from Karening. We’re all in this together.