|Although this article is based on canonical information, the actual name of this subject is conjectural.|
- Buffy: "Knerf!"
- Willow: "Oh, Nerf! Not Nerf. Knife!"
- — Buffy Summers and Willow Rosenberg[src]
The "Knerf" was a dagger used by Buffy Summers to kill a demon that attacked her and her friends at the park. The demon was choking Buffy when she asked Willow Rosenberg for the knife and so she pronounced it "Knerf!".
- "The Wish"