An object that is very powerful, or able to win.
"That tank is too uberpwnzall! It needs a nerf!"
"Wow, I love that jet! It's uberpwnzall"
"Gah! Stupid developers! Your updates only screw everything up! That tank was uberpwnzall before you wrecked it!"
"Wow, Urban Dictionary is uberpwnall! It has more than 4,313,200 definitions!"