Yes, I believe the French expression for this is double entendre.
It is like saying have a good day, only people replace day with one. It is a saying. Have a good one.
Irony is saying one thing while meaning another.
"Speaking with one voice."
Yes, saying the opposite of what one means is known as sarcasm. It is a form of verbal irony where the intended meaning is different from the literal meaning of the words spoken.
This is known as being "two-faced" or "speaking with a forked tongue." It implies insincerity or deception in communication by saying one thing but meaning another.
Yes, that is the meaning of the slang.
When someone uses a double negative they end up saying the opposite of what they wanted to and the meaning of the sentence doesn't get across to the other person.
You were probably referring to the saying "you can't have cake and eat it too" meaning one cannot have more than one deserves or can handle at one time.
Double entendre is French for double meaning of a word or a phrase - an apparent, innocuous, meaning and another, normally more mischievous, one. Often used by gossip writers and by politicos.
meaning of double hump
The meaning of a double entendre in simple terms it is a figure of speech that describes one word with having two distinct and different meanings of their own.
The double star means Upgraded Grade by one level.