A chata is someone who is a backstabbing whore. Beware of chatas, they might seem pretty when you meet...but as you get to know them they will become uglier and uglier. They will lie to get their way and criticize everyone behind their back. A chata is not someone you want to have around since it is the equivalent of a street whore.
He hired a chata to have sex with him for 2 dollares.