Analects of Confucius, Book XIII
But let your ‘Yes’ be ‘Yes,’ and your ‘No,’ ‘No.’ For whatever is more than these is from the evil one.
“Weasel words,” as that expression is usually understood, are words that are deliberately used in a vague or ambiguous way so as to allow the speaker to avoid saying what he really thinks. The phrase is inspired by the way a weasel can suck out the contents of an egg in a manner that leaves the shell largely intact. A weasel word is like a hollowed-out egg, one that seems on the surface to have content but which is in fact empty.