The Oxford Dictionaries' word of the year is a word nobody actually uses

The Oxford Dictionaries' word of the year is a word nobody actually uses  Washington Post 'Youthquake' named word of the year by Oxford Dictionaries  CNN 'Youthquake' is Oxford's word of 2017. What does it mean?  USA TODAY 'Youthquake' named 2017 word of the year by Oxford Dictionaries  The Guardian Why 'Youthquake' Is Oxford's Word Of The Year  HuffPost UKFull coverage