Where one uses the keyboard with great speed and accuracy in an RTS game to control multiple units at a time. Some players with extensive ubermicro can control their worker or builder units to build a base whilst also controlling their offensive units.
Apparantly, RTS noobs often forget that the keyboard exists.
This term was made more popular by the internet show purepwnage.
Jeremy: I was like playing generals and like this guy was like a total noob so I like used my ubermicro to control like 50 units on like three fronts and I like owned him!
The absolute maximum quantification. Quote "I love you ubermaximus". Ubermaximus is thee ultimate accolade one can give as a.complement. Quote "You are so ubermaximus,baby". Or "that tune is ubermaximus, dude". Or "that wine is soo ubermaximus, darling". Or "that sports car is sooo ubermaximus, maan.