noun
In sports such as tennis or baseball, a person (usually a boy or young man) who retrieves balls and keeps the game moving. Compare ボールガール (ball girl).
See also: ボールガール
テニスの試合でボールボーイが素早くボールを拾った。
The ball boy quickly picked up the ball during the tennis match.
Variant with a middle dot, sometimes used for clarity.
Refers specifically to a female ball retriever, while ボールボーイ is male or gender-neutral in context.
Loanword from English 'ball boy'.