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3. 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.
1. 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.
2. UPO
Unidentified Puntable Object
Puntable meaning kickable obviously.
Small dog, soccer ball, any thing puntable.

"God that little yappy UPO was getting annoying"
love it
hate it