noun
an assistant who supplies drinking water
• Syn: ↑waterer
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noun : one who keeps a group (as of laborers or football players) supplied with drinking water
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1. a person who carries a canteen or bucket of drinking water to those too occupied to fetch it, as to soldiers, laborers, or football players.
2. a person who sees that livestock is supplied with water, as by filling water troughs.
[1630-40]
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water boy,
a boy who supplies or distributes water to a group, such as soldiers or laborers: »
He started as a water boy before World War I, toting water to thirsty construction workers (New York Times).
Useful english dictionary. 2012.