Mug up

verb, slang

Definitions

Verb
  1. 1
    To study intensely. intransitive, slang

    "I mugged up on the meaning of road signs before taking my driving test."

  2. 2
    study intensively, as before an exam wordnet
  3. 3
    To paint one's face or put on a costume for the purpose of impersonation. intransitive, obsolete, slang

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