I learned something about this just the other day. It seems to me like it's untrue/rewriting history, but there are some people that believe snozzberry was a code word for penis by Roald Dahl.

Apparently he used the word in a later "adult" story of his; "I grabbed hold of his snozzberry...". Some take this to mean it was a penis all along, but personally I think it was still just a nonsense word he made up and used for more than one purpose.