The Plum Juice is a 'monster drop' and a consumable that was introduced during the Ratboy's Nightmare Update. It is one of the many collectibles that are needed by the players in order to complete the entries of the Itempedia of the Nightmare. Valid ways of acquiring the Plum Juice include the following:
- A possible 'uncommon' drop from the Goons.
- A possible 'uncommon' drop from the Traffic Buster.
- A possible serving from The Deli's waits.
In appearance, it is a purple glass bottle wrapped with white 'cloth' at the center of the bottle. The plum juice is contained in the bottle, sealed with a brown cork cap on top.
The Plum Juice can be used and consumed by the players to restore 50 HP back to the players' health pools. In addition, the players will temporarily gain 3 additional walkspeed points, which can be stacked multiple times in order to allow the player to move quickly from one place to another for a short period of time.