Meaning trap
mess up
make a mistake
To do something incorrectly or make a mistake that causes a problem.
Don't mix these meanings
Same phrase, different job.
To do something incorrectly or make a mistake that causes a problem.
Another meaning of 'mess up' is 'make untidy'; compare the examples to keep the meanings separate.
Hear it in context
Notice where the phrase sounds natural.
I really messed up my presentation by forgetting my notes.
Honestly, I messed up my first driving test because I was too nervous.
Fix the pattern
One small grammar move makes it sound right.
Not: I really messed it.
Say: I really messed it up.
'Mess up' is separable but you can't drop 'up' — bare 'mess it' isn't English here.
Which sounds natural?
Tap the one a native speaker would say.
'Mess up' is the casual way to admit a mistake; 'committed an error' is formal/stiff.
Build natural chunks
Words that usually travel with it.
mess up + task
- the order
- my lines
- the whole thing
- big time
Don't confuse it
Related
Other meanings and phrases to compare.
- mess up (make untidy) — Another meaning of 'mess up' is 'make untidy'; compare the examples to keep the meanings separate.