similar to drunk dialing or drunk texting, it's when you are drunk and add items to your netflix queue. you don't realize you added the items until you receive a dvd in the mail that you have no memory of requesting.
you go to the mailbox and open your red envelope ready to watch the next episode of "it's always sunny in philadelphia", only to find that you have "marley and me" instead. and you're like WTF! how did this shit get in my queue?! i must have been drunk netflixing last week.
The craft of watching an entire series in a shortened amount of time. Why watch your favorite show one episode at a time when you have the ability to practice the Art of Netflixing and never feel the suspense of a cliff hanger? Until the finale, of course.
NextFlixing is when you endlessly cycle through the movie and TV titles on a streaming service finding stuff you're not interested in or want to watch just not right now. This is normally followed by settling on something you've already seen and falling asleep moments later.
"Last night I spent an hour NextFlixing before deciding to watch the same episode of Star Trek I have seen100 times."