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 6, 2005
Unequivocally Fucked Over. Being so incredibly screwed that nothing will even compare to how screwed you are.
by Koldhart101 June 10, 2013
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 8, 2004
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
The sexual act in which a man performs on a woman (preferably someone's mother). First all the lights are turned off for total darkness. Next the man slips a glow-in-the-dark condom over his penis and then begins to float around the dark room; thus giving the effect of a flying spaceship, or other un-identified floating object. The woman then is invited to catch such object with whatever she pleases, i.e. her mouth or other orifices. When the man grows weary of floating around, he then proceeds to crash-land his "ship" into the woman's "Area51”.
"Hey Mitch, I totally UFO 'd your mom last night ! "
"She always loves when I crash my UFO in her. "
by Matty58 March 27, 2008
Unidentified Fucking Object, which means a designer dildo
Jessica saw a UFO in the middle of Roxanne's bedroom
by Jumbled McGobbledygook February 17, 2021