A wingnut is a handy, stabilizing piece of hardware. So how did it come to be a pejorative term for those of a particular political persuasion? This is part of a complete episode.
Nerd used to be a term of derision, connoting someone who was socially awkward and obsessed with a narrow field of interest. Now it’s used more admiringly for anyone who has a passion for a particular topic. Linguists call that type of...