tsuwm, dalehileman, very nice links. Thank you. Bookmarked and ready for perusal, but not this late.

Maybe it's something as simple as "double entendre." I just thought that with all the specialized terms there are, there would be something that pegs "a figurative saying which, if taken literally, expresses the opposite of something else."

... Though, in a couple of my examples, it doesn't state the opposite.