Phrase guide

muck up

verb · 4 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

verb

Meaning 1

To ruin unintentionally.

Definition source: English Wiktionary via Wiktextract

Usage: informal, intransitive, transitive

Examples

  • The terrorists have really mucked up our holiday plans.

Meaning relationships

Synonyms: mess up, blow it, bobble, boob, crap up, drop a bollock, drop the ball, err, flub, flub up, foul up, fuck up, goof, goof up, make a mistake, misdo, misstep, put a foot wrong, screw up, slip up, stuff up, stumble, trip over the wire, trip up

Antonyms: none provided

2

verb

Meaning 2

To clown around; to have fun, often at the expense of others.

Definition source: English Wiktionary via Wiktextract

Usage: Australia, informal, intransitive

Examples

  • It's the last day of school and everyone is mucking up.

Meaning relationships

Synonyms: muck about, muck around, fuck about, fuck around

Antonyms: none provided

3

verb

Meaning 3

soil with mud, muck, or mire

Definition source: Princeton WordNet 3.0

Examples

  • The child mucked up his shirt while playing ball in the garden

Meaning relationships

Synonyms: mire, muck, mud

Antonyms: none provided

Broader terms: dirty, soil, begrime, grime, colly, bemire

4

verb

Meaning 4

make a mess of, destroy or ruin

Definition source: Princeton WordNet 3.0

Examples

  • I botched the dinner and we had to eat out
  • the pianist screwed up the difficult passage in the second movement

Meaning relationships

Synonyms: botch, bodge, bumble, fumble, botch up, muff, blow, flub, screw up, ball up, spoil, bungle, fluff, bollix, bollix up, bollocks, bollocks up, bobble, mishandle, louse up, foul up, mess up, fuck up

Antonyms: none provided

Broader terms: fail, go wrong, miscarry

History

Etymology

No etymology was provided for this word.