Tarra
Tarra: Can be a female name, or when used as an improper noun, can mean a deadly female assassin who dresses in all black. A tarra generally wears sunglasses to hide her identity, and to keep glare out of her eyes while on the prowl. Can be hired for money, but usually only pounces on spontaneous impulses.
"Hey, call Tarra."
          or

"Man, this guy is annoying...call my tarra."