1. The use of words in a sense opposite to their literal meaning, especially for ironic or humorous effect.
Usage: A rhetorical device; closely related to irony; Common in informal speech and literature

Examples

• Calling a clumsy person 'graceful' is an example of antiphrasis.
• When she said 'Oh, that's just brilliant!' after he spilled coffee on her, she was using antiphrasis.
• The sign read 'Beautiful weather!' during a terrible thunderstorm—a clear case of antiphrasis.
• Antiphrasis is often used in comedy to create humor through contradiction.
• He called his tiny apartment a 'palace,' employing antiphrasis to express his frustration.