backroom staff en · NOUN
Meanings
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(plural, plural-only) The members of staff who work out of public view, such as the coaching team in a sports club.
Meronym: backroom boy
Wenger's wild celebrations with his players and backroom staff told the story - and made it eight wins in Arsenal's last nine games.
2011 October 29, Phil McNulty, “Chelsea 3 - 5 Arsenal”, in BBC Sport: