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Verb: bone up
Usage: informal
  1. Study intensively, as before an exam
    "I had to bone up on my Latin verbs before the final exam";
    - cram [informal], grind away, swot [Brit, informal], mug up [Brit, informal], swot up [Brit, informal], bone [informal], revise [Brit]

Derived forms: boned up, bones up, boning up

Type of: hit the books [informal], study