a 2000s thing. another word for cool or pog, but just weirder.
bob: that is sooo ubercool!
pete: you mean pog, right?
sara: bob is SUCH a 2000s kid.
The ultimate, above all, the best, top, something that nothing is better than.
add cool to that and what do you get?
iubercool!/i
Mini Coopers are ubercool!