Definition of mug up
: to work up by study
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Recent Examples of mug up from the Web
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Anyone who has ever worked in a cannery knows that 'mug up' is a colloquial term for coffee break.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mug up.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of mug up
circa 1860
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