pro·mis·cu·ous 
(prə-mĭsky-əs)
(prə-mĭsky-əs)adj.
1. Having casual sexual relations frequently with different partners; indiscriminate in the choice of sexual partners.
2.
a. Lacking standards of selection; acting without careful judgment; indiscriminate: criticized him for being promiscuous in his friendships.
b. Showing little forethought or critical judgment; casual: the promiscuous use of the word "populism."
3. Consisting of diverse, unrelated parts or individuals; confused: "Throngs promiscuous strew the level green" (Alexander Pope).
4. Biology Having a variety of functions, targets, or hosts; nonselective: promiscuous enzymes; promiscuous drugs; a promiscuous parasite.
[From Latin prōmiscuus, possessed equally : prō-, intensive pref.; see PRO-1 + miscēre, to mix; see meik- in the Appendix of Indo-European roots.]
pro·miscu·ous·ly adv.
pro·miscu·ous·ness n.