Ant spit

Ant Spit is a luminous green liquid thrown out by giant ant queens at the player character, when encountered in the Corvega Factory and Marigold Metro to name a few. Although it is seen to have a value it can not be picked up by the player, as it is a scripted item; Meaning that the script effect only allows it to be shot by the Ant Queen, but cannot be interacted with. When hit by the Ant Spit, a small amount of Radiation damage is also released from the waste, onto the player. It has a wg of 0 and no value of any kind.

If you have fast reflexes, you can "catch" the ant spit before it hits and damages you. It won't appear in your inventory, though as its effect won't allow it to be used as an item.