mess up

(phrasal verb) to make a mistake

Example Sentence:

If you mess up one more time, you will get fired!

I can’t believe I didn’t study for the test! I messed up my chances to go to law school now!

Mary really messed up when she forgot her husband’s birthday!

I keep messing up this assignment. Can you help me?

From the News:

New daylight time may mess up medical devices, authorities say

Media:

Similar idioms:

1. screw up
2. fuck up