The Associated Press reports:
The word — sometimes spelled usie, sometimes ussie — has been showing up in written material since at least April 2013, according to Ben Zimmer, executive producer of Vocabulary.com and language columnist for The Wall Street Journal.

Don't believe it's really a thing? Check out the USIE hashtag on Instagram.
Usies are here to stay.

Better get used to it.

Only trouble is, a lot of people seem to loathe the word with a passion.
Nein RT @lukelewis: NO RT @MiriamElder: No RT @sirajdatoo Nope @AP Group selfies get a name: Usie (prounounced uss-ee, like fussy)
Alberto Nardelli@AlbertoNardelliFollow
Nein RT @lukelewis: NO RT @MiriamElder: No RT @sirajdatoo Nope @AP Group selfies get a name: Usie (prounounced uss-ee, like fussy)
4:55 PM - 30 Jul 14RetweetFavorite
There is a new name for a group selfie and OH GOD I'VE JUST THROWN UP MY LUNCH http://t.co/aF9NcK8SPL
Felicity Morse@FelicityMorseFollow
There is a new name for a group selfie and OH GOD I'VE JUST THROWN UP MY LUNCH http://t.co/aF9NcK8SPL
4:56 PM - 30 Jul 14RetweetFavorite
BURN IT. BURN IT WITH FIRE AND SCATTER THE ASHES http://t.co/pTgCuEvPXe
erin mccann@mccannerFollow
BURN IT. BURN IT WITH FIRE AND SCATTER THE ASHES http://t.co/pTgCuEvPXe
3:18 PM - 30 Jul 14RetweetFavorite
"What's the word for a group selfie?" he thought, moments before clouds blotted out the sun forever. "Usie, I guess?"
Chris Heller@c_hellerFollow
"What's the word for a group selfie?" he thought, moments before clouds blotted out the sun forever. "Usie, I guess?"
5:13 PM - 30 Jul 14RetweetFavorite