What is "buck up"

interj. 1 (context idiomatic English) cheer up; take courage; take heart. 2 (context idiomatic dated English) hurry up; make haste. vb. 1 (context idiomatic intransitive English) To become encouraged, reinvigorated, or cheerful; to summon one's courage or spirits. 2 (context idiomatic transitive English) To encourage or refresh; to hearten. 3 (context idiomatic intransitive dated early 1900's English) To dress oneself up smartly; compare (''obsolete'') (term: buck) ("a fop, dandy") 4 (context idiomatic transitive colloquial English) To pass on to higher authority for resolution. See also (term: pass the buck).

v. gain courage [syn: take heart]