Originally "choto" referred to a type of sausage, but because of its shape began to refer to the male genitalia as well. Its use todays however is much wider. Not only can "chota" be used to refer to the genitalia of both men and women, it is also used to describe something really bad or broken. If your TV broke you can say "se choteó la tele". To be vulgar you can say "chupáme la chota" (suck my dick).