Jeffy is the puppet character from Logan Thirtyacre's SML series on YouTube, known for exaggerated reactions and inappropriate classroom behaviour. Clips of his outbursts were cut into short audios and shared across meme pages and soundboards, where this teacher insult became a reusable reaction separate from its original episode. Its popularity comes from the contrast between a school setting and total disrespect, so creators keep using it for homework, detention and strict teacher jokes long after the scene first circulated online.