Definition of "shrinkage" noun countable and uncountable , plural shrinkages
(slang) The reduction in size of the male genitalia when cold , such as from immersion in cold water . quotations
Quotations Do women know about shrinkage ?
1994 Peter Mehlman & Carol Leifer, "The Hamptons," Seinfeld, Season 5, Episode 20 (aired May 12, 1994), Spoken by Jerry Seinfeld (Jerry Seinfeld)
And of course , one of the most important questions of all , especially among male plungers , is , "What about shrinkage ?!"
2010, Fran Capo, Art Zuckerman, Susan Zuckerman, “Polar Bear Clubs”, in It Happened in New York City: Remarkable Events That Shaped History, Globe Pequot, page 51