The Flapping Forest was the name of the forest where Snodrog the pedant lived (The Pedant and the Shuffly).

The forest contained "rotting crabapple trees and quaking aspens...dying of Parkinson's disease" (Pedant, 7) and a road that ran past Snodrog's house. It is said that "most travelers who ventured into the [forest] were not seen again" (Pedant, 17). This was because Snodrog ensnared those who passed his house with his logic traps that transformed them into Flimsies, large, fluttering, flapping linen napkin-like creatures. It is from this flapping that the forest gets its name.