chinstrap
n.— «Jaw line Beard—This, as the name implies, follows your jaw. It usually flows out of the sideburns, follows the jaw and comes together with the other side at the chin. You also get the added ability to customize, where you can add in any various chin beards or mustaches. More commonly known as the “Chinstrap.”» —“The key to becoming studly: Go stubbly” by Andrew Cumbee in University of Nebraska at Omaha The Gateway Sept. 5, 2006. (source: Double-Tongued Dictionary)
Further reading
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