1. I accidentally spilled the juice and now I've completely messed up the tablecloth.
2. Please don't mess up the living room before the guests arrive.
3. I didn't mean to mess up your hair, I was just trying to fix it.
4. You really messed up that presentation by forgetting your key points.
5. I hope I don't mess up my speech in front of the whole class.
6. If you don't follow the recipe carefully, you might mess up the cake.
7. I'm sorry I messed up the plans for tonight, I got the dates mixed up.
8. Don't mess up the order of the documents, they need to be in a specific order.
9. My little brother always manages to mess up my neatly organized desk.
10. I can't believe I messed up my chance to apologize to him, I should have been more careful.