Here is the containing paragraph:
Disruption also attracts attention: disruptors are people who look for trouble and find it. Disruptive kids get sent to the principal’s office. Disruptive companies often pick fights they can’t win. Think of Napster: the name itself meant trouble. What kinds of things can one “nap”? Music … Kids … and perhaps not much else. Shawn Fanning and Sean Parker, Napster’s then-teenage founders, credibly threatened to disrupt the powerful music recording industry in 1999. The next year, they made the cover of Time magazine. A year and a half after that, they ended up in bankruptcy court.
What does the verb "nap" mean here? I've looked at many dictionaries but couldn't find any suitable meaning.