In italian (and expecially in south dialects) zoccola means "bitch", whore. The very same word is also used for the female of the rat (expecially sewer rat). "Zoccole" is the plural feminine form (
masculine form does not exist with the same meaning, in fact "zoccolo" means hoof, clog).
The sentence in
the example is written on a wall of an italian city (in italian dialect) and exploits the ambiguity of the meaning.