Antiphrasis

Antiphrasis as euphemism

Examples

• "Take your time, we've got all day", meaning "hurry up, we don't have all day".
• "Come into my parlour, said the spider to the fly" appears to be an invitation, but is in fact a threat.
• "Tell me about it", in the sense of "don't bother, I already know".
• "Great!", an exclamation uttered when something unpleasant had happened or is about to happen.