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Definition muck in British English

muck verb

verb
/mʌk/
1

to waste time, especially when you should be doing something useful or paying attention

Example

We just mucked around at home all weekend.

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2

to cause trouble or problems for someone

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3

to damage or spoil something

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4

to not deal with something well or skilfully so that you do not achieve what you intended

Example

I couldn't take the risk of mucking up my chances.

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5

to spoil something or prevent it from being successful

Example

Well that's completely mucked up my evening.

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6

to make something dirty or untidy

Example

Don't muck up the clean floor.

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7

to behave badly or in a silly way that wastes time

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Definition muck in British English