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buck up
WIKTIONARY
buck up
Interjection
  • Cheer up; take courage; take heart. idiomatic
  • Hurry up; make haste. idiomatic, dated
Verb
  • To become encouraged, reinvigorated, or cheerful; to summon one's courage or spirits; to pluck up courage. idiomatic, intransitive
  • To encourage or refresh; to hearten. idiomatic, transitive
  • To dress oneself up smartly; compare (obsolete) buck ("a fop, dandy") idiomatic, intransitive, dated, early 1900's
  • To pass on to higher authority for resolution. See also pass the buck. idiomatic, transitive, colloquial