Noun
polar bear plunge (plural polar bear plunges)
An outdoor plunge or swim in the middle of winter, often through ice.
polar-bear plunge
Among the crowd gathered outside Daphne’s are Jody, left, and Erin, who are celebrating 10 years doing the Polar Bear Plunge. Source: Internet
The Polar Bear Plunge was canceled, meaning throngs of people will not leap into the frigid waters off Coney Island on New Year’s Day. Source: Internet