Vile Spit

Vile Spit is a projectile fired by Corruptors, which are only encountered in Hardmode Corruption biomes. It also fired by the Eater of Worlds in. It moves steadily in a straight line at and breaks if it comes in contact with any block. Upon striking a target, Vile Spit has a small chance to inflict the Weak debuff. It can be easily destroyed by hitting it with any weapon or tool capable of dealing damage.

Trivia

 * As it is only fired from enemies that are native to the Corruption, one will not see Vile Spit in a Crimson world, unless an artificial Corruption biome is created.
 * Prior to the 1.2 update, Vile Spit would convert any blocks it came in contact with to their Corrupt counterparts.
 * Internally, Vile Spit is an NPC instead of a projectile. The reason for this is its ability to be destroyed.