1931, in the meaning defined above
The Illuminating History of 'Gaffer'
Etymologically, it’s a nod to the Corleones
best bower
best boy
best-case
“Best boy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/best%20boy. Accessed 23 Nov. 2024.
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