gamine

noun

1. A (usually female) street urchin; a homeless girl.
2. A mischievous, playful, elfish, pert girl or young woman.

adj

1. Having a boyish, mischievous charm; elfish, typically with short hair.

   “In her navy linen trousers and her, perhaps too tight, white jersey, Jennifer was determinedly gamine.”

   “It’s a wildly dated-looking and derivative film, a quaint adventure in fantasised naughtiness, like Ozon’s teen prostitute fantasy Jeune et Jolie in 2013, which starred his lead actress here, Marine Vacth, in a similarly gamine role.”