the world > life > the body > external parts of body > neck > [noun] > back of neck > hair at (2)
In plural. Erectile hairs along the back, neck, or shoulders of an animal (esp. a dog), which rise when it is angry or alarmed.
In African-American usage: the nape of the neck; the short hair that grows in this area, esp. in a knotted or tangled condition; a knot or tangle of…