If you take your seventh grader to a sleepover, and his friend opens the door and asks, "What is your name? What is your quest? What is your favorite color?" in a squeaky voice, and you think that's hilarious, you just might be a geek.
If every time you watch a television show or a movie and the hero is suddenly pursued by villains, you have a tendency to yell, "REAVERS!!!" you just might be a geek.
If your twelve-year-old actually enjoys talking with you about politics, you just might be a geek.
If your entire dinner conversation consists of quotes from O Brother Where Art Thou, you just might be a geek.
If your family has repeated debates about the correct order in which to watch the six Star Wars films, you just might be a geek. (Ditto for which order one must read the Narnia books.)
If you find yourself with a few extra minutes to spare, and you decide to go hunt for a geocache before you pick up the kids from school, you just might be a geek.
If your favorite thing to do as a family on a Friday night is watch repeats of Monty Python's Flying Circus or Star Trek, you just might be a geek.
If you have frequent conversations about which Star Trek series you think is the best, you just might be a geek.
If you're seriously considering reviving your Doctor Who habit after more than twenty years because your teenager insists you'd love it, you just might be a geek.
(For the record, Star Wars Episode 4: A New Hope should be watched FIRST and Revenge of the Sith should be watched LAST. So there. Oh, and even though The Magician's Nephew is chronologically the first book in The Chronicles of Narnia, you should read The Lion, the Witch, and the Wardrobe first. My all-time favorite Star Trek series? Voyager.)