From Halopedia, the Halo wiki
- "We stayed anyway. The place had cold groob, and they had the game on, so whatta we care, right?"
- — Unnamed Commuter
Groob is some form of human refreshment, most enjoyable when served cold. Its exact nature, or whether it can be enjoyed in other temperatures is unknown.
List of appearances
- Halo Graphic Novel
- Second Sunrise Over New Mombasa (First mentioned)
- ^ Halo Graphic Novel, page 90