Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “mess sb up”

mess sb up

(CAUSE PROBLEMS) phrasal verb with mess     /mes/ verb
to cause someone to suffer emotional and mental problems: Drugs can really mess you up.Making people sad, shocked and upsetScience of psychology and psychoanalysisMind and personality
(Definition of mess sb up (CAUSE PROBLEMS) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of mess sb up

Browse related topics

You are looking at an entry to do with Science of psychology & psychoanalysis, but you might be interested in these topics from the Psychology, psychiatry, & psychoanalysis topic area:

Translations of “mess sb up”

Word of the Day

handout

a document given to students or reporters which contains information about a particular subject

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More