often seen in the street without a hat

Well, fanny (UK not US) was a kind of cupping motion at his crotch. That's why I wondered if cunt was the same, logically it probably should be, but is there a way of conveying the increased rudeness? A bigger motion, perhaps. (And "boob" was the motion of cupping a breast. I don't know if the leer he had was part of the sign, or an added bonus.)