An especially short miniskirt, abbreviated to the point of being dangerous to wear outside of a theatrical venue, as the brevity of the hemline does not provide the necessary coverage an otherwise more full-length skirt would provide. Microskirts are frequently the "skirt of choice" for prostitutes, exotic dancers, or women who simply like to attract attention (see: "Go Hoochie") and/or like to live dangerously.
An extremely short miniskirt that does not extend the base of the crotch—generally less than 8″ long—exposing the thighs and lower part of the butt and panties.
Originating in the 60s—including some school uniforms of Japanese culture—and adopted heavily in Western culture by tween and teen girls as part of deliberate and promiscuous fashion.
Also used officially by cheerleaders and performers and more recently found as part of a swimwear fashion known as a bikini-skirt, where the bikini brief is clearly exposed under a frilly microskirt.
When someone wants to fuck you, but they don't know it yet or want to keep it on the DL. It's flirting, but at a subtler level.
Girl #1: Hey skank, lay off my ex
Girl #2: Um...we were just talking, bitch
Girl #1: Um...no you weren't. Thats the 4th time this week you complimented his hair, you just touched his arm, and that was some subtle eye-fuck action. Don't think I don't know about microflirting, bitch.