water drinker

plural water drinkers

1. Someone who drinks water, especially in preference to alcoholic drinks; a teetotaler.First known use 15th c.

   Could not resist Metcalfe's fine dishes and wines. Sir Joshua began to be a water-drinker.

   1789, James Boswell, edited by Danziger & Brady, Boswell: The Great Biographer, Yale, published 1989, page 21

   1 more example

   Ben Franklin, an American and a water drinker, found his fellow workers at Watts's printing house ‘great guzzlers of beer’ around 1725.

   2012, Jerry White, London in the Eighteenth Century, Bodley Head, published 2017, page 326

2. obsoleteChristianityA member of an early Christian sect which drank water instead of wine during the Eucharist.First known use 16th–19th c.
3. historicalSomeone who drinks the waters at a spa.First known use 17th c.