It means any femme/fem/female who can't keep it in her pants/skirts and looses it when she sees any guy and doesn't care whether she has character, morality and most-important, loyalty and fidelity towards any single Man ever.
Loose cunt means very loose and not-at-all strong charactered girl or female who cannot adjust with single Boy/Man partner ever and just fools around looking for other Guys(whenever she finds slight problems to deal with and solve it or adjust with in her seemingly
short love-life) to cheat on her Live-in partner /
Boyfriend / Husband. IT'S DEFINITELY NOT A COMPLIMENT AT ALL, BUT A STRONG OPINIONATED SUGGESTION(OFCOURSE IN GOOD
FAITH) TO MEND YOUR WAYS FOR GOOD, BECAUSE NO ONE LIKES OR CARES ABOUT A LOOSE CUNT, THESE KINDA
PEOPLE (FEMALE OR MALE) EVENTUALLY ARE LEFT ALONE AND DISCARDED BY EVERYONE.