Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “mess sth up”

mess sth up

verb uk phrasal verb with mess   /mes/ us  
to make something untidy or dirty: Who's messed up the bookshelf?Making things dirty and untidy
(Definition of mess sth up phrasal verb, verb from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of mess sth up?
Browse related topics

You are looking at an entry to do with Making things dirty & untidy, but you might be interested in these topics from the Clean, dirty and cleaning topic area:

Add Cambridge dictionaries to your browser to your website

Definitions of “mess sth up” in other dictionaries

Word of the Day

bitter

a type of dark brown beer with a bitter taste

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