Synonyms of 'buck up'
▷ See buck
1 rallyDictionary, brighten, cheer up
After half-time we started to buck up.
2 hurry upDictionary, speed up, hasten
Buck up or we'll be late!
I woke when we started to speed up.
get under way
get a move on
I'd better get a move on if I want to finish on time.
put your foot down (informal)
increase the tempo
shake a leg
Come on, shake a leg! We've got loads to do today.
open up the throttle
put on speed
rattle your dags (New Zealand , informal)
You'd better rattle your dags and get on with this before the boss gets back.
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If someone brightens or their face brightens, they suddenly look happier.
Seeing him, she seemed to brighten a little.
Thesaurus for buck up from the Collins English Thesaurus
If you buck someone up or buck up their spirits, you say or do something to make them more cheerful.