1. Nigel made a complete balls-up of the arrangements.

2. I made a real balls-up of my exams.

3. The whole trip was a complete balls-up.

4. I made a proper balls-up of that exam.

5. He's made a real balls-up of this.

6. Well, we've had our chance at running the world, I guess, and a right bloody balls-up we've made of it too.