It's official. 'Twerk' and 'Selfie' are now in the dictionary.

The Oxford Dictionaries Online have addeed the words in additiona to digital detox, Bitcoin, BYOD, emoji, FOMO, geek chick, hackerspace, phabet, srsly and TL;DR.

In previous years they've added: lolz, totes, OMG, LOL, mankini, jeggings, and sexting.

How are 'Twerk' and 'Selfie' defined you ask?

Twerk: informal dance to popular music in a sexually provocative manner involving thrusting hip movements and a low, squatting stance

just wait till they catch their daughters twerking to this song twerk it girl, work it girl

Origin: 1990s: probably an alteration of work

Selfie: informal a photograph that one has taken of oneself, typically one taken with a smartphone or webcam and uploaded to a social media website

occasional selfies are acceptable, but posting a new picture of yourself everyday isn’t necessary

Origin: early 21st century: from self + -ie

Read more via Mashable or Oxford Dicitionaries

Photo Credit Getty Images