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Noun: nerf  nurf
Usage: informal
  1. (trademark) a brand of toy weapons and the soft foam material used in them, especially for shooting foam darts or balls
    "The kids had a blast with their new nerf guns";
    - Nerf
Verb: nerf  nurf
Usage: N. Amer, informal
  1. To reduce the power, effectiveness, or impact of something, especially in competitive contexts like video games or sports
    "The developers nerfed the overpowered weapon in the latest update"

Derived forms: nerfing, nerfed, nerfs

Encyclopedia: Nerf