The Grub sound comes from Hollow Knight, the 2017 action-adventure game by Team Cherry. In the game, Grubs are small captive creatures hidden across Hallownest, and their cries became memorable to players because they signal discovery, rescue, and completion progress. Online, the clip is shared in Hollow Knight compilations, lore videos, and meme edits whenever someone wants a cute in-game noise with instant recognition. It stays popular because even a very short Grub cry is enough for fans to identify the game.