American Dictionary

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Definition muck in American English

muck verb

verb
/mʌk/
1

to not deal with something well or skillfully 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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2

to spoil something or prevent it from being successful

Example

Well that's mucked up my evening.

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3

to make something dirty or messy

Example

Don't muck up the clean floor.

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4

to behave badly or in a silly way that wastes time

Synonyms and related words
Definition muck in American English