Binding of Isaac: Rebirth Wiki

Chub is a boss that can appear in the Caves Caves and the Added in Afterbirth Flooded Caves Flooded Caves.


Chub moves randomly around the room in cardinal directions and can perform the following attacks:

  • Charges at Isaac whenever he lines up with one of her cardinal directions.
    • Chub eats any Bomb Bombs dropped in her path; stunning her for a moment before dealing considerable damage.
  • Spawns a 1-2 Charger Charger up to a maximum of 5 (occasionally 6 if she spawns 2 while there are 4 alive).
    • Chub's charge attack can damage and kill any Chargers.

Chub deals a whole heart of contact damage.

Champion Versions Needs to be unlocked[]

Cyan: 15% larger and slower than normal, with 25% more HP (437.5). Spawns Removed in RepentanceBlack/Added in RepentanceOrange-coloured Boil Boils instead of Chargers. Despite the different color, they behave exactly like normal Boils.
Orange: 15% smaller and faster than normal, with 15% less HP (297.5). Spawns Spitty Spitties

instead of Chargers.



  • Chub is often paired with Chargers in the boss room.
  • When using Dr. Fetus Dr. Fetus' bomb combined with a shot type that passes through enemies, Chub will not eat the bomb.
  • Each segment of Chub can be individually damaged, so a single piercing tear could hit Chub multiple times.
    • Added in Repentance Piercing shots no longer damage segmented enemies multiple times per attack.
  • Chub will eat Troll Bomb Troll Bombs (such as those set by other bosses) just like bombs dropped by Isaac.
  • Best Friend Best Friend can damage Chub if eaten, similar to a bomb.
  • Added in RepentanceMeat Cleaver Meat Cleaver can instantly kill Chub.


  • Chub appeared in the original Binding of Isaac.
    • Sometimes, in the original game, Chub would spawn with only two segments, preventing her from spawning anything. This can also happen in Repentance.
  • Carrion Queen Carrion Queen is the posthumous version of her, and C.H.A.D. C.H.A.D. is the alternate version.
  • She is the boss version of the Chargers.
  • Chub is one of four bosses to have its posthumous version in the same chapter, the other cases being Gemini Gemini having Blighted Ovum Blighted Ovum in chapter 1, Polycephalus Polycephalus having Added in Afterbirth The Stain The Stain in chapter 2 and the Added in Repentance Tuff Twins Tuff Twins having Added in Repentance The Shell The Shell in Chapter 2.5.
    • However, Chub doesn't appear in the same environment as Carrion Queen, who appears in the Catacombs Catacombs while Chub appears in The Caves and the Added in Afterbirth Flooded Caves.
  • Chub is confirmed to be female. [citation needed]
  • Chub may also be a reference to the Dodongos from The Legend of Zelda, which Link had to toss bombs into their mouths to kill. This is supported by the Rules Card's display of "CHUB DISLIKES SMOKE", a reference to "DODONGO DISLIKES SMOKE" from the original Legend of Zelda.
  • Added in Afterbirth † The Matriarch The Matriarch is a boss from Booster Pack #5 that is simultaneously based of Chub, Fistula Fistula, and Added in Afterbirth † Fistuloid Fistuloid. When at low HP, she will split into a medium-sized Fistula, two small Fistulas, a Fistuloid and Chub.
    • Unlike the usual pattern, if the Chub from The Matriarch eats a bomb, she'll spit it back at the player.
  • Chub is one of the four bosses that can be spawned by It Lives It Lives, the other three being Fistula (as of Repentance), Polycephalus and Teratoma Teratoma.
  • Added in Afterbirth † Prior to Booster Pack #5, Chub could spawn Drowned Charger Drowned Chargers if she was fought in the Added in Afterbirth Flooded Caves Flooded Caves. This also applies to Added in Afterbirth The Stain The Stain.


Bug Bug! Removed in Afterbirth † If Chub is killed while frozen by Mom's Contacts Mom's Contacts, only the part to receive the last shot will die.