Well, there are no irresistible forces. And, there are no immovable objects. So, the question has no answer. We do not live in a universe which allows irresistible forces and immovable objects.
So, an irresistible force cannot meet an immovable object. As I said above, we do not live in a universe which allows irresistible forces and immovable objects. In fact, no universe can ever allow both irresistible forces and immovable objects. And, the question has no answer.on my opinion.