And the runners-up include...

CORBYN MANIA: Fervent enthusiasm for Labour leader Jeremy Corbyn.

CUFFING SEASON: The time in autumn and winter when single people seek settled relationships rather than affairs.

ECHO CHAMBER: An environment, especially on a social media site, in which any state- ment is greeted with approval because it will be read only by those with similar views.

GENDER-FLUID: Not identifying exclusively with one gender.

GIG ECONOMY: One in which most jobs are temporary.

UNICORN: Recently launched business valued at more than one billion dollars.