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best boy

American

noun

Movie and Television Slang.

the first assistant to the head electrician.

best boy British

noun

the assistant to the senior electrician or to the key grip in a film crew

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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best boy

It’s telling that while Mr. Deakins takes pains to praise his longtime gaffer, key grip, dolly grip, best boy and more, he never bothers to define those roles for the lay reader.

From The Wall Street Journal ● Mar. 13, 2026

“I’m the best boy ever! I love to play. I love snuggling and I’ll let you put silly costumes on me,” said the caption on the Feb. 14, 2022 Instagram post.

From Los Angeles Times ● Jan. 30, 2026

"From key grip to best boy, everyone on the show has a fabulous recipe to share," the description of the book reads.

From Salon ● Oct. 12, 2022

"Gavin and his partner, Lauren brought him up to be the best boy ever. Freddie was Gavin's whole world and spending time with him was his favourite thing to do," it said.

From BBC ● Oct. 9, 2022

‘You’re the best boy in the world. I’ll never, ever forget you.’

From "Code Name Kingfisher" by Liz Kessler

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023