U theory is about when something is gone.
for instance the opposite of alot of words with U like it was real, it was ureal.

So when something was there, and then it's gone simply put U infront
U-Theory:
Morten has a boat, but we can't see it so it's an uboat

Casper failed 1.g so now we call him Ucasper

My cat runs on batteries, and when the batteries are on it's invisible, so it's a Ucat
by Fudgeduplolbbqsauce December 17, 2007
Get the u-theory mug.
1. The most annoying debate in Final Fantasy history.

2. The Final Fantasy 8 theory which states that Ultimecia is Rinoa's future self.

3. A proven theory.
Guy: Ellone knew Seifer, Zell and Irvine.

Girl: But when Ellone takes Squall to Rinoa's past, you view her thoughts. which proves the R=U theory.
by Raven Firestone November 7, 2008
Get the R=U Theory mug.