As they do from time to time, the people behind the Oxford English Dictionary need to prove to the young people, they're still with it slang-wise. They announced the new addition of many, many words Aug. 27.
It's an exhaustive list, and a varied one. 'Manspreading', 'NBD', 'fangirl', 'hangry', 'brain fart', 'b*tch face', 'bruh', 'butthurt', 'fur baby', 'MacGyver, 'mkay', 'rando', 'swole' and just so many others.
The mic drop in question can be a literal 'instance of deliberately dropping or tossing aside one's microphone at the end of a performance or speech one considers to have been particularly impressive', but it's more likely to be figurative – or an exclamation to emphasize a particularly impressive point: Nuff said. Mic drop.
If you want to describe something as excellent, you can use awesomesauce; on the other side of the coin, anything of a poor or disappointing standard is weak sauce. Weak sauce came first, and has a more comprehensible origin as a metaphor; an inadequate sauce would certainly let down an otherwise decent meal. Though awesomesauce clearly comes from the words awesome and sauce, the former is currently beating the latter in the Oxford English Corpus and Oxford Twitter Corpus.
The breadth of the words that have been added are actually pretty huge. Some are very contemporary, like the inclusion of 'Mx." as an ungendered alternative to Mr. or Ms. and even the addition of 'cat café' is something representative of a relatively recent eatery trend.
But there are other new words that seem woefully old. Like, they added 'pwn', 'pwned' and 'pwnage'. First, if the OED is so proud of its timeliness, those words should have been in there about a decade ago. Second, probably because no one's used those terms since then.
They also included 'butt dial'. Cell phones have been near ubiquitous for 15 years and so have butt dials. It's crazy to think they hadn't added that yet. The same goes for the new inclusion of 'beer-o-clock', 'manic pixie dream girl' and even 'redditor'.
So, go read the blog post and rest easy that most of the words you and your friends stopped using last year are now officially a part of the Oxford English Dictionary.