Jeffy is a secret character that can only be found if you type in "Why you do that" during the Night 1 cutscene.
Jeffy seems to resemble his original self from the SML series, but he is always seen lacking hands, eyes, and feet. He also lacks the name "Jeffy" that is usually on his shirt. The pencil in his nose now appears to be rotten, and a few mushrooms are growing out of it. Large mushrooms are also growing out of the holes where Jeffy's eyes should be.
Jeffy starts in the Storage Room before moving to the Staff Area, the Lounge, the Meat Freezer, or The Office. Jeffy is very slow, making him not much of a threat. If he gets into your office, you have to shut off a camera to make him go away. If you fail to do this, Jeffy will climb onto the desk and start screaming and moaning. This causes the suits to go faster. In this way, the more suits that are active, the more dangerous Jeffy becomes.
Jeffy's quotes are five of his "uh" sounds that are ripped straight from the original videos.
- His shade is sometimes seen sitting on your desk, patting its diaper. It looks just like Jeffy, but it still lacks feet and eyes, but it now has grotesque-looking hands.