ball boy

noun
  1. Tennis. an attendant, usually a boy or young man, employed to retrieve balls and supply players with them.
  2. Baseball. an attendant, usually a boy or young man, who retrieves foul balls and brings the umpire new balls during the game.

Origin of ball boy

First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for ball boy

ball boy

ball girl

noun
  1. (in sport, esp tennis) a person who retrieves balls that go out of play
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