water cooler
From Longman Dictionary of Contemporary Englishwater coolerˈwater ˌcooler noun [countable] 1 a piece of equipment, used especially in offices, from which you can get a cup of cold water to drink2 → water cooler gossipExamples from the Corpuswater cooler• water cooler gossip• How do you think that would play around the old water cooler?• The All-Star team is always a good topic for discussion around the water cooler or at the bar.• Meetings around the water cooler are encouraged rather than discouraged.