This is often used in advertisements by "ladies of the night". It stands for "half sex". It means that she does not do "everything" -does everything but intercourse
It was a real bummer when I read her advertisement and it only said "h/s”. I was looking for the whole thing...
The name of a well known sign in Los Angeles that is recognised by many. The sign is trademarked, so you cannot use it commercially. A video made by Tom Scott describes the reason the H******** S*** is censored.