Fatty (ふとっちょ Futotcho) is an over-weighted monster appearing in The Binding of Isaac: Rebirth. They appear in Chapter 1 and 2.
Fatty's appearance look similar to the Gaper enemy with a potbelly and small bloody tears. They are actually known to be taller than Gapers.
They act like Gapers in some way. They move towards Isaac but are significantly slower and also have an additional attack in where the Fatty will stop to fart and push Isaac away if he gets too close, which could move Isaac into hazardous obstacles such as Spikes or Fireplaces. They still deal contact damage though.
- Ironically, Fatties sometimes come in pack with Skinnies.
- Fatties are the first enemies to be revealed by Edmund McMillen while Rebirth is under development.
- The word "fatty" is a common insult used on heavy-set people.