Contrary to the belief of many, "npm" is not in fact an abbreviation for "Node Package Manager." It is a recursive bacronymic abbreviation for "npm is not an acronym." (If it was "ninaa", then it would be an acronym, and thus incorrectly named.)

So the author named it npm for node package manager, then wanted to sound clever so he said it doesn't stand for that? He could just as easily called it "aslkdjghasjklg" and said it's an abbreviated version of "aslkdjghasjklg is not an acronym. And that would still be dumb.

It's like inventing a device to produce collimated beams of light, and then naming it "laser" for "laser is not an acronym" when everyone knows what it actually means.