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Verb: buck up
Usage: informal
  1. Become cheerful
    - cheer, cheer up, jolly [informal]
     
  2. Cause (somebody) to feel happier or more cheerful
    - cheer, cheer up, jolly along [informal], jolly up [informal], jolly [informal]
     
  3. Gain courage
    - take heart
Interjection: buck up
Usage: informal
  1. Exclamation to tell someone to be quicker
    - chop-chop [informal], hurry up, come on, c'mon [informal], get a move on [informal]

Derived forms: bucks up, bucked up, bucking up

Type of: cheer, embolden, hearten, joy, recreate, rejoice