I found this on facebook, and since I'm incredibly bored, so I'm going to mark all of the things that apply to me.
The 'textbook' definition of a TCK before:"A third culture kid is a person who has spent a significant part of his or her developmental years outside their parents' culture. The third culture kid builds relationships to all the cultures, while not having full ownership in any. Although elements from each culture are assimilated into the third culture kid's life experience, the sense of belonging is in relationship to others of the same background, other TCKs."
[x]"Where are you from?" has more than one reasonable answer.
 You've said that you're from foreign country X, and your audience has asked you which US state X is in.
 You flew before you could walk.
[xx] You speak two languages, but can’t spell in either.
 You feel odd being in the ethnic majority.
 You have three passports.
[x] You have a passport but no driver's license.
[x] You go into culture shock upon returning to your "home" country.
[x] Your life story uses the phrase "Then we moved to..." three (or four, or five...) times.
[x] You wince when people mispronounce foreign words.
[x] You don't know whether to write the date as day/month/year, month/day/year, or some variation thereof.
[x] The best word for something is the word you learned first, regardless of the language. :-D
[x] You get confused because US money isn't colour-coded.
[x] You think VISA is a document that's stamped in your passport, not a plastic card you carry in your wallet.
[x] You own personal appliances with 3 types of plugs, know the difference between 110 and 220 volts, 50 and 60 cycle current, and realize that a transformer isn't always enough to make your appliances work.
[x] You fried a number of appliances during the learning process.-Only my best friends' hairdryer :-)
 You think the Pledge of Allegiance might possibly begin with "Four-score and seven years ago...."
[x] Half of your phone calls are unintelligible to those around you.
[x] You believe vehemently that football is played with a round, spotted ball.
[x]You consider a city 500 miles away "very close."
 You get homesick reading National Geographic.
[x] You cruise the Internet looking for fonts that can support foreign alphabets.
[x] You think in the metric system and Celsius.
[x] You may have learned to think in feet and miles as well, after a few years of living (and driving) in the US. (But not Fahrenheit. You will *never* learn to think in Fahrenheit).
 You haggle with the checkout clerk for a lower price.
[x] Your minor is a foreign language you already speak.
[x] When asked a question in a certain language, you've absentmindedly respond in a different one.
[x] You miss the subtitles when you see the latest movie.
[x] You've gotten out of school because of monsoons, bomb threats, and/or popular demonstrations.
[x] You speak with authority on the subject of airline travel.
[x] You have frequent flyer accounts on multiple airlines.
[x] You constantly want to use said frequent flyer accounts to travel to new places.
[xxxx] You know how to pack.
[x] You have the urge to move to a new country every couple of years.
[x] The thought of sending your (hypothetical) kids to public school scares you, while the thought of letting them fly alone doesn't at all.
[x] You think that high school reunions are all but impossible.
[x] You have friends from 29 different countries.-eh, do wallonia and flanders count as different countries?
[x] You sort your friends by continent.
[x] You have a time zone map next to your telephone.
[x] You realize what a small world it is, after all.