The word of the year as awarded by MW Dictionary is w00t.
I never thought MW would cave in to the pop-culture usage. It derives from leet-speak, mostly.
Massachusetts-based Merriam-Webster Inc. said “w00t” — typically spelled with two zeros — reflects a new direction in the American language led by a generation raised on video games and cell phone text-messaging.
It’s like saying “yay,” the dictionary said.
(SOURCE)