buck up

/B AH1 K AH1 P/
verb
  1. 1

    (idiomatic, intransitive) To become encouraged, reinvigorated, or cheerful; to summon one's courage or spirits; to pluck up courage.

  2. 2

    (idiomatic, transitive) To encourage; to hearten.

  3. 3

    (idiomatic, intransitive) To do better.

  4. 4

    (idiomatic, transitive, colloquial) To pass on to higher authority for resolution. See also pass the buck.

  5. 5

    (idiomatic, transitive, African-American Vernacular, slang) To hit or fight (someone).

  6. 6

    (idiomatic, intransitive, dated) To dress oneself up smartly; compare (obsolete) buck ("a fop, dandy")

  7. 7

    (obsolete) To hurry up.