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1.
usless piece of shit
that twat is such a upos
by reens August 02, 2005
16 5
 
2.
UPO
Unidentified Puntable Object
Puntable meaning kickable obviously.
Small dog, soccer ball, any thing puntable.

"God that little yappy UPO was getting annoying"
by bdagz February 24, 2010
10 5
 
3.
upo
Another way to say "your mouth", so if you accidentally type "Shut upo" in an online arguement, the person can't call you stupid.
justasaurus says:
shut upo?
síi says:
yes
justasaurus says:
way to type loooooooser
síi says:
upo means 'your mouth', obviously.
by Shiloanne October 16, 2007
11 11
 
4.
UPO
Unidentified Phallic Object. A flying saucer with a penis.
The UPOs penis was flapping against it's underside as it zoomed across rural America.
by Jstat October 09, 2008
3 4
 
5.
UPO
Unidentified Photoshopped Object

A supposed picture of a flying saucer or extraterrestrial spacecraft which is an obvious fake created via image editing
UFO pictures these days are almost always one of two types:

- A blurry dot that could be anything
- A UPO
by Aratastsaads August 22, 2011
1 3