The Lump is a Monster which can be encountered in The Womb or Utero. It appears as a red lump popping out of the ground, with a gaping mouth and two beady eyes. It attacks by shooting a spread of three shots when Isaac comes within range, then burrowing underground and resurfacing in a different part of the room. Lumps will also burrow underground if the player doesn't come in its range for a certain amount of time.
Notes
- When a Lump is a Green or Purple Champion, it can be seen teleporting around the room while burrowed.
Trivia
- Lumps had a radically different appearance in the original Binding of Isaac.
- Lumps are similar in appearance to the Betus enemies from one of Edmund McMillen's previous games, Super Meat Boy.
Lumps can appear as light-brown in the Scarred Womb.
- Lumps are now red in the Scarred Womb.
Lumps can appear as light-brown in the 
Variations
Tar Boy
Tar Boys were added in Booster Pack #4.
Like the Lump, the Tar Boy burrows underground and resurfaces in a different part of the room. It will frequently fire a short-ranged spray of shots towards Isaac that leaves behind slowing black creep.
If Isaac is standing in the black creep, Tar Boys can occasionally cause several shots to fire straight upwards out of the creep where Isaac is standing. This can also occur with black creep spawned by other enemies such as Gushes.
Bugs
 Bug!
|
If you stun a Lump at the same time that it burrows underground, it will cause their sound effect to repeat continuously for a few seconds. |
|---|
| Bug!
|
If a Lump spawns as a Light White Champion, when the Lump burrows underground, its Eternal Fly will rapidly teleport around the room, potentially resulting in unavoidable damage. |
|---|
Gallery
Concept art for Tar Boy.
Error: DLC context not properly closed. If context boxes have been used in subsections, a {{context clear}} template should be used at the end of the associated section.
 The Binding of Isaac: Rebirth
|
|---|
