v. phr. , informal To make or become more cheerful; make or become free from discouragement; become more hopeful. After the heavy rain, the scoutmaster bucked up the boys by leading them in a song. Tom was disappointed that he didn't make the team; but he soon bucked up.
BUCK UP
Meaning of BUCK UP in English
American idioms English vocabulary. Английский словарь американских идиом. 2012