on Jane Friedman site:
I hadn’t heard of plotting versus pantsing when I wrote my first two novels—and I didn’t know much about planning at all.
For those who haven’t heard of plotting versus pantsing, it refers to one group of writers who prefer to plan first then write, as opposed to a second group who prefer to write by the seat of their pants. (As a Brit, I had to learn that this meant trousers and not knickers.) The polite term—and my preferred one—for pantsing is intuitive writing. Intuitive writers, according to the common story, simply write, however the mood takes them, and plan later on.
Plotting versus pantsing is one popular version of the plan first/write later myth.