Nerf
Origin 1
From automobile racing; to bump another car (ca. 1950s?).
Full definition of nerf
Verb
- (auto racing) To bump lightly, whether accidentally or purposefully.A racer will often nerf another as a psychological tactic.
Origin 2
From the trademark NERF (an abbreviation of "non-expanding recreational foam"), a range of toys made of soft foam, ineffective as actual weapons (1969).
Verb
- (slang) to water down, dumb down or especially weaken, particularly in video games.The lightning spell was pretty powerful before they nerfed it.