pit zip
n.— «Armpit zippers, affectionately called pit zips, allow you to adjust your body temperature to various wind conditions.» —“Sugoi Vapor Urban Jacket and Conrad Pant” by Chris Cosby Dirt Rag Aug. 7, 2006. (source: Double-Tongued Dictionary)
Further reading
A young listener wonders: Why do the words icing and frosting both refer to the idea of being cold? The names for this sweet cover on a cake refer to its appearance, not its temperature. Something similar occurs with the glaze in glazed doughnut...
So you’ve long dreamed of writing fiction, but don’t know where to begin? There are lots of ways to get started — creative writing classes, local writing groups, and books with prompts to get you going. The key is to get started, and...