For number one overused word of the second half of the first decade of the second millennium:
fundamental
Damn you, John McCain, for using this word and being quoted saying it over and over and over and over.
Oh and a dishonourable mention for the (soon-to-be-former, thank you, universe) Governor from Alaska: progress was never intended to be verbed the way you verb it, you ignorant unelite.
Tweet
Oh and it’s actually the third millennium now, I’ve realised.