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)

Unidentified flying object as in similar to a space ship.

unidentified flying object.

Nickname for LSD.

Or more commonly known as an Unidentified Flying Object(alien)

UFO is an unidentified Flying Object. Association is an organized body of people who have an interest in common;a society. UFOAssocation is an organized body of people who have a common interest in unidentified flying objects (UFOs).

the process by which a man tucks his penis and genitalia into his ball sack, making it look like an unidentified flying object

the female equivalent of love handles. Caused by belly fat protruding over tight pants. Usually spotted in the summer when women wearing belly bearing shirts are common. So named because the fat sticks out and hovers around their tummies/hips, creating a shape quite like an unidentified flying object.