Sermonating is when a person in a conversation, suddenly starts spewing bible verses like a sermon.
Person 1: "Bro have you played Elden Ring yet?"
Person 2:"That game is unholy, Timothy 2:15 Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth."
Person 1: "Stop Sermonating"