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to muck up

to muck up

5 7.6
To ruin something by making mistakes or doing it badly
  • phrasal verb
  • Informal
translation icon : estropear
  • He managed to muck up the recipe by forgetting to add salt.
  • muck things up
  • just muck it up

So at this point we have mucked up all the digits.

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Examples

  • The middlemen get in the middle and muck things up.

    Blog text (10)
  • Yeah, well, the problem is, it seems we've mucked it up.

  • And if you stay here, you will muck it all up.

  • I have no idea why anyone would want to muck it up even worse.

    Blog text (12)
  • Feel free to call me out on anything I really muck up.

    Blog text (12)
  • We do our best not to muck it up.

    Blog text (14)
  • You mucked up the whole exit.

  • Leave it to the politicians to muck it up and leave us defenseless!

    Fiction book (1991)
  • I would love to paint my kitchen cabinets and put on new hardware, but I am so afraid of mucking it up.

    Blog text (12)
  • The good news is that we currently have a reliable QB who isn't going to muck things up for us against Wofford.

    Blog text (10)

Synonyms

to mess
vsto muck up
  • Informal
4.2

To handle something in a way that causes damage or problems

is the casual act of spoiling by mistakes rather than general interference
to screw up
vsto muck up
  • Informal
641 6.3

To make a mistake that ruins what you are doing

is the same basic idea but can sound slightly less direct or strong
to mess up
vsto muck up
  • Informal
597 2.8

To make a mistake that causes a problem

is the informal general sense of spoiling by mistakes rather than specifics
to fuck up
vsto muck up
  • Offensive
203 9.9

To make a serious mistake that ruins something

is the milder informal way to describe spoiling through mistakes
to spoil
vsto muck up
80 2.8

To make something less good or enjoyable

is the narrower idea of ruining by mistakes rather than general damage
to mix up
vsto muck up
  • Informal
65 2.7

To make people confused and things messy

is the practical spoiling by mistakes rather than mainly causing confusion
to botch
vsto muck up
63 6.0

To do something badly and spoil the result

is the broader everyday idea of spoiling by making mistakes
to fuck it up
vsto muck up
  • Offensive
37 9.9

To do something badly and ruin how it turns out

is the standard informal term without the explicit coarse emphasis
to mishandle
vsto muck up
20 4.9

Deal with something badly so it causes problems or damage

is the everyday informal spoiling action rather than this managerial focus
to fumble
vsto muck up
19 3.5

To do something clumsily and make a mistake

is the more general spoiling action rather than specifically clumsy handling
to bumble
vsto muck up
18 5.4

To move in a clumsy, confused way

is the direct spoil-by-mistake idea rather than general awkwardness
to goof
vsto muck up
  • Informal
17 5.6

To make a silly or careless mistake

is the general spoil-by-error idea rather than a single silly error
to bungle
vsto muck up
16 6.8

To do something clumsily so it causes mistakes

is the broader casual sense of spoiling or making a mess by error
to foul up
vsto muck up
  • Informal
8 6.4

To make a mistake that ruins something because you are careless

is the standard informal term for spoiling by mistakes rather than this phrasing
to muff
vsto muck up
5 8.2

To fail to catch or handle something because you are clumsy

is the general concept of spoiling by mistakes rather than this performance focus
to louse
vsto muck up
  • Informal
5 8.9

To spoil something by doing it badly

is the broader casual verb for making a mess through error
bungled
vsto muck up
4 6.1

Made worse because someone handled it badly

is the general idea of spoiling by mistakes, not only professional incompetence
to louse up
vsto muck up
  • Informal
4 8.1

To make a mess of a plan or task by doing it badly

is the general informal term for ruining by mistakes rather than this specific slang
to disorganize
vsto muck up
  • US
4 4.5

To make something lose its order or structure

is the general spoil-by-mistake sense rather than structural disorganization
botched
vsto muck up
2 5.9

Ruined because someone did the job badly

is the informal act of spoiling something through mistakes rather than formal failure
to fluff
vsto muck up
  • Informal
2 5.4

To make a mistake especially by forgetting words on stage

is the simple informal idea of ruining by mistakes rather than this lighter term
to flub
vsto muck up
  • Informal
2 6.8

To make an embarrassing mistake because you are careless or nervous

is the broader act of spoiling rather than the nervous error focus here
to botch up
vsto muck up
  • Informal
2 6.7

Do a job badly and make a mess of it

is similar but slightly more general about making mistakes rather than only clumsiness
to cack
vsto muck up
  • Offensive
1 9.9

To pass poo or, in slang, to fail and make a mess of something

is the neutral informal way to say something was spoiled by mistakes
to ball up
vsto muck up
  • Informal
1 7.9

To do something badly and ruin how it turns out

is the standard informal sense of spoiling by mistakes rather than this idiom
to bollocks up
vsto muck up
  • Offensive
1 9.9

To do something so badly that it fails

is the neutral informal way to describe spoiling by mistakes
to make a pig's ear of
vsto muck up
  • UK
1 9.3

Do something very badly and spoil how it turns out

is the everyday way to say someone spoiled something through mistakes
to crap up
vsto muck up
  • Offensive
1 9.9

To ruin something by making a mistake or being careless

is the everyday informal sense of spoiling by mistakes rather than this frank term
to bollocks
vsto muck up
  • Offensive
9.9

To spoil or ruin something by making a careless mistake

is the everyday informal sense without blunt slang tone
to bollix
vsto muck up
  • Slang
9.9

To ruin something by doing it badly

is the common casual expression for making mistakes that spoil things
to make a schmutter
vsto muck up
  • Slang
9.9

To do something badly so it goes wrong

is the neutral informal term for spoiling by mistakes rather than playful slang
to frig up
vsto muck up
  • Slang
9.8

To do something badly and make it fail

is the standard informal sense of spoiling by error rather than this variant
to bodge
vsto muck up
  • UK
9.9

Do a job badly so it does not work

is the common informal term for ruining by mistakes rather than this dialectal term
to booger up
vsto muck up
  • Informal
9.9

To ruin something by a careless mistake

is the standard informal meaning of making a mess by mistakes rather than playful slang
to misfuck
vsto muck up
  • Offensive
9.9

To ruin something completely by making serious mistakes

is the everyday informal description without coarse emphasis

Antonyms

1.0

To make something better

fix
76 1.0

An action that makes something work again

How Ruined

to ruin
2.0
to muck up
  • Informal
5 7.6
to botch
63 6.0
to slip up
  • Informal
27 4.1
to err
50 5.5

Surface Forms

muck up infinitive
mucked up past
mucked up past participle
mucking up present participle
mucks up third person singular

Morphology

muck + up

The base verb 'muck' (to soil or make dirty) plus the particle 'up' (which often signals completion/intensification) yields a clear metaphorical meaning of making a mess of or spoiling something. A B1 learner who knows both constituents can usually infer this extended sense, though the specific collocational use for 'making mistakes' is somewhat idiomatic and may require minimal exposure.

Etymology

Muck up also grew a figurative meaning from that same image of mess: if you cover a plan or a job in muck it is ruined or unusable, so to muck up came to mean to spoil or make a mess of something. That's why we now use muck up to say someone 'spoiled' a task by making mistakes.