For the benefit of those who asked.
Promiscuity is the practice of making relatively casual and
indiscriminate choices. The term is most commonly applied to sexual
behavior, where it refers to a person who does not limit their sex
life to the cultural norm, typically one partner, or to the
framework of a long term monogamous sexual relationship. Because of
the popularity of this usage, the remainder of this article
discusses sexual promiscuity. People who are called "promiscuous"
under this usage, may in fact be quite selective in their choice of
sexual partners.
Promiscuity is discouraged by conservative modern day religions.
However, some sects, cults, and religious orders have a place for
promiscuous behavior. For example, there were special examples of
religious prostitution in ancient Mesopotamia, Greece and
Rome.
In simple english, it means having more than one sex partner.