In Reply to: Lemon-juice message posted by Victoria S Dennis on October 01, 2009 at 17:04:
: : Why do people say 'lemon-juice message' and 'eggness'?
: Do they? In what context? I know that you can use lemon juice as "invisible ink" - you can't see what has been written until you heat the paper or paint it over with iodine. So a
: 'lemon-juice message' could be a secret message decodable only by someone who knew how. Does that fit the context in which you have heard it?
Eggness, even more than "lemon-juice message," needs some context. Eggs have many properties which, if not unique, are at least characteristic. But in any case the word is not a phrase.