1. too attractive, appealing, or compelling to be resisted or refused
2. impossible to resist or overcome by force; unstoppable

Examples

• The chocolate cake was irresistible; everyone wanted a slice.
• She had an irresistible charm that drew people to her.
• The team's irresistible offense scored on every drive.
• He found the offer irresistible and accepted the job immediately.
• The urge to laugh became irresistible during the funny movie.
• Her irresistible smile lit up the entire room.
• The force of the hurricane was irresistible, destroying everything in its path.