werewhisker

A large dark, whisker located unnaturally high on the cheek, suggesting possible fictional lycanthropic condition. Often noticed close to or during a full moon.

Lionel stared at himself in the mirror, with only the foggiest of recollections of the drunken night before, when he noticed several werewhiskers appearing on his upper cheek where he'd never previously noticed them, and laughed at the possibility of 98-pound-him tearing the villagers apart.