greyback

Etymology
From.

Noun

 * 1)  A Confederate soldier during the US Civil War (because of the grey uniforms).
 * 2)  A louse.
 * 3)  Any of various grey birds.
 * 1)  A louse.
 * 2)  Any of various grey birds.
 * 1)  Any of various grey birds.
 * 1)  Any of various grey birds.