(slang) A photographic group portrait, especially one taken manually (not using a timer, tripod etc.) with a small camera or mobile phone by a member of the group.
2013, Chris S. Yoon, "#Ussies", The Prospector (Cupertino High School, Cupertino, California), Volume 55, Number 1, 27 September 2013, page 8:
“I've never taken a selfie before, but I've definitely taken an ussie. […]
2014 April 14, Mona Sinha, “Me, myself”, in The Hindu:
An ‘ussie’ or a ‘groupie’ taken, at the 86th Academy Awards, by the host Ellen DeGeneres and featuring 12 Hollywood celebrities broke all records for being re-tweeted.
2014 October 10, Gwen Rockwood, “Selfie psychology”, in Marshfield Mail:
I’ve snapped a few pictures while using the backward-facing camera on my smartphone, but most of those shots have been “ussies” which are pictures of yourself next to someone else.