Rape gang
From Memory Alpha, the free Star Trek reference
A rape gang was usually a group of men who preyed on lone females. They would rape and terrorize the victim.
On Turkana IV, Natasha Yar, for ten years of her life (age 5 to 15), evaded the rape gangs by hiding. (TNG: "The Naked Now") When the USS Enterprise-D found itself at the edge of the known universe, Yar envisioned herself back on her world. In the vision, she found a cat. Hearing the sound of the approaching rape gang, Yar said to the cat, "It's not safe here for you. Go." Soon afterwards, the lieutenant returned to the reality of the starship. (TNG: "Where No One Has Gone Before")
