A term describing a non-discerning , sexually promiscuous woman who enjoys having copious sex with numerous different partners of the opposite sex. It is suspected that these women are afflicted with or possibly afflicted with various "dirty" venereal diseases that affect the lower pelvic region and the legs.
Dirt leg is often synonymous with slut or whore; however, dirt leg is much classier than saying either of these terms and can be used in somewhat mixed company.
Wow, that babe hooked up with two different guys last night! What a dirt leg!
She loves hooking up with random guys. I don't know if she actually has sex with them, but she certainly has dirt leg tendencies.