The Oxford English Dictionary adds new words on a regular basis to reflect new cultural phenomena.
"Bro hug"
Definition: a friendly embrace between two men.
"YOLO"
Definition: "You only live once;" used to express the view that one should make the most of the present moment without worrying about the future (often as a rationale for impulsive or reckless behavior).
"Adorbs"
Definition: arousing great delight; cute or adorable.
"Selfie"
Definition: a photograph that one has taken of oneself, typically one taken with a smartphone or webcam and shared via social media.
"Fuhgeddaboudit"
Definition: forget about it (used to indicate that a scenario is unlikely or undesirable).
"Yas"
Definition: expressing great pleasure or excitement.
"Vom"
"Gaydar"
Definition: the supposed ability of homosexuals to recognize one another by means of very slight indications.
"Phablet"
Definition: a smartphone having a screen which is intermediate in size between that of a typical smartphone and a tablet computer.
"Glam-ma"
Definition: a glamorous grandmother, especially one who is relatively young or fashion-conscious.
"Worstest"
Definition: worst in emphatic use.
"Dance-off"
Definition: a competition, or a round in a competition, in which a number of dancers compete against each other until a winner is declared.
"Emoji"
Definition: a small digital image or icon used to express an idea, emotion, etc.
"Bestie"
Definition: a person's best friend.
"Bookaholic"
Definition: a habitual and prolific reader; a compulsive book buyer.
"Twerk"
Definition: dance to popular music in a sexually provocative manner involving thrusting hip movements and a low, squatting stance.
"Vlog"
Definition: a personal website or social media account where a person regularly posts short videos.
"Glamping"
Definition: a form of camping involving accommodation and facilities more luxurious than those associated with traditional camping.
"Hangry"
Definition: bad-tempered or irritable as a result of hunger.
"Binge-watch"
Definition: to watch multiple episodes of (a television program) in rapid succession, typically by means of DVDs or digital streaming.