1. Become cheerful
   "She bucked up after talking to her friends";
   - cheer, cheer up, jolly [informal]
    
2. Cause (somebody) to feel happier or more cheerful
   "The coach's speech bucked up the team";
   - cheer, cheer up, jolly along [informal], jolly up [informal], jolly [informal]
    
3. Gain courage
   "He bucked up from their words of encouragement";
   - take heart

1. Exclamation to tell someone to be quicker
   "buck up! We're going to be late for the movie";
   - chop-chop [informal], hurry up, come on, c'mon [informal], get a move on [informal]

Derived forms: bucking up, bucked up, bucks up

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