"spinner" was always one of my favorite terms. One of my best friends- r.i.p., would always point out the "spinnners" as they passed- "check out the spinner, kid", making crude spinning gestures with his hands.
From Wikipedia-
"Spinner is a term used primarily in the adult film industry and the sex worker industry, but has also gained a small amount of mainstream use.
It refers to an actress with a tiny frame, usually very thin and having small breasts. Such a woman is so small that she can supposedly mount a man's penis and easily spin around on it. Two prominent examples of "spinners" in the porn industry are Kobe Tai and Nikki Charm."