Buff
Weak
Weak is a Terraria buff. 4 NPCs can inflict it: 
Brain of Cthulhu, 
Creeper, 
Floaty Gross and 1 more.
What it does
Physical abilities are decreased
Type
- Debuff: it harms you.
In numbers
- -5.1% melee damage
- -5.1% melee speed
- -10% movement speed
- -4 defense
Measured by the game on a character with only this buff.
Inflicted by
| Source | Chance | Duration | Conditions |
|---|---|---|---|
| Brain of Cthulhu | 11/243 (4.53%) | In Expert or Master Mode | |
| Creeper | 11/81 (13.6%) | In Expert or Master Mode | |
| Floaty Gross | 1 in 25 (4%) | 2 minutes | |
 Vile Spit | 1 in 20 (5%) | 5 minutes |
Chance is per attempt to apply it. Duration is set by the game code.