Definition
A strap that fastens under the chin to secure a helmet, hat, or other headgear in place. Also refers to a species of penguin identified by a thin black line running under its chin.
Example Usage
He adjusted the chinstrap on his motorcycle helmet before setting off on the highway.
Origin
Compound of 'chin' and 'strap,' dating back to at least the 19th century for helmet fastenings.
Fun Fact
The chinstrap penguin is named for the distinctive marking on its face and can dive to depths of over 200 meters in search of fish.
Source: Definition backfill (hailey)
Related Terms
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See “chinstrap” in Corporate Speak, Gen-Z Slang, Pirate Speak, and more.
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