Derogatory term for a (usually younger) female, implying trashiness or tackiness, lower-class status, poor hygiene, flakiness, and a scrawny, pockmarked sort of ugliness. May also imply promiscuity, but not necessarily. Can apply to any race, but most commonly used to describe white trash.
You know that girl Krenisha that lives in the trailer park? She's a total Lleyana.