water cooler
noun
- container in which water is kept cool
Wiktionary
adj
Etymology: Attributive use of the noun.
- Of the nature of things discussed around a water cooler.
“In those days The Late Show was Monday water cooler topic du jour.”
“water-cooler gossip, water-cooler talk, water-cooler conversation, water-cooler discussion”
noun
Etymology: A category of cooling device.
- A type of cooling device that uses water as the heat transfer medium.