Means the same as super. Most recently used by fans of anime & Japanesestreet fashion trends. Is also slang used in the subtitles of the anime Gals! also known as Super Gals.
A German word.
Has more than just one definition, though...
When someone overreacts - dann "überreagiert er".
But, also when someone is above of something else, he is "über etwas".
"Ich bin über Dir." - I am above of you.
"Ich bin überglücklich!" - I am very lucky.
The worst use of a word from German because it sounds uber-tacky. See what I mean? I have never heard a German use that expression- ever. Please stop so you won't make a fool of yourself.