meaning really or a lot of. it's used by geeks everywhere, and it's german. i have no idea who started it in it's geeky context in north america tho. it can be used as a prefix to almost any descriptive word. Example: that k10k site is uberpixelly-smooth. also, burgerking whoppers are uberyummy!
UBER
Meaning of UBER in English
Slang English vocab. Английский сленговый словарь. 2012