a strap attached to a hat for passing under the chin of the wearer.
a strap to support the chin in cosmetic facial treatment.
a strap on a bridle or halter that joins the throatlatch and noseband.
Origin of chin strap
First recorded in 1865–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for chinstrap
Contemporary Examples of chinstrap
The characters were more like Snow White, or Cinderella, or the Power Puff Girls, and I had to wear a big head with a chinstrap.Alison Brie on ‘Community’s’ New Beginning, Dan Harmon’s Return, Nicolas Cage, and More
January 3, 2014