n. The effect created by two or more employees having an informal, face-to-face conversation, as though at a watercooler.
2002
There also was the "watercooler effect," or the theory that people come up with their best ideas when grouped informally, said Jeff Wirt, president of the Pasadena, Calif.-based interior design firm Wirt Design Group, which planned open offices for several tech companies during the 1990s.
1992 (earliest)
The MVP president attributed the success of HMOs in general to the "watercooler" effect — employees comparing insurance plans among themselves at work. "HMOs have been around long enough so that people feel they're OK," Oliker said. "When you can say you're getting value, people really respond to that."