Ultimate Frisbee Organization, a group of young athletes committed to playing Ultimate Frisbee, a sport based around tough but fair play and speed balance and athletic ability.
by Ben Meredith "Gunch" July 12, 2005
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Abbreviation for "Unidentified Flying Object". The USAF defines a UFO as: Anything that relates to any airborne object which by performance, aerodynamic characteristics, or unusual features does not conform to any presently known aircraft or missile type, or which cannot be identified as a familiar object. (USAF Regulation 200-2)
The Mutual UFO Network (MUFON) is the world's largest civilian UFO scientific reseach organization.
by ufologist February 06, 2005
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Unidentified Flying Object. Has evolved from a simple military classification to a word synonomous with aliens, Roswell, conspiracy theories, and general paranormal nuts.
It's a UFO! Oh, wait, it's an airplane. Or a pie plate. Or a crazy person.
by Disco Stu December 08, 2004
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1. Unidentified Flying Object. Usually refers to an alien spaceship that we don't know anything about it

2. Ugly Fat Old. Usually describes women who are well past their days, and even then they probably weren't very hot. They are usually seen in public in twos or threes and the only thing they do is talk to each other no matter the circumstances.
1. That UFO just crashed down in an open field. We have no idea where they came from.

2. Some UFOs sat in front of me at the movie theater the other day and they wouldn't shut up for the whole entire movie.
by tuesday22 July 05, 2012
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UFO stands for unidentified flyung object or use of what people say aliens fly in.
Guy: hey yo look at the ufo!
Girl: OMG I wonder if there are aliens in it!
by WarriorKittyGirl03 March 26, 2018
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The best pants in the world. The are light as a feather, they dry fast if you spill something on them, they don't wrinkle, they are easy to get in any size and are very adjustable, they come in almost every color, they have buttons on the pockets so your stuff doesn't fall out when you sit down, and they're the most comfortable pants ever. They fit snuggly around the waist and the legs are wide without looking like hakama pants (those dress-looking pants that you see martial artists wear sometimes)
I have four pairs of UFO's because they are the candy cigarettes of pants!
(you know, because candy cigarettes are the best candy ever)
by The Yellow Dart2 February 07, 2006
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