best boy
US /ˈbest bɔɪ/
UK /ˈbest bɔɪ/

1.
best boy, hoofdassistent gaffer/key grip
the chief assistant to the gaffer (lighting technician) or the key grip (camera and rigging technician) on a film or television set
:
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The best boy made sure all the lighting equipment was ready for the next scene.
De best boy zorgde ervoor dat alle belichtingsapparatuur klaar was voor de volgende scène.
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She started her career as a grip and worked her way up to best boy.
Ze begon haar carrière als grip en werkte zich op tot best boy.