What does the word buck mean?

Usage examples for buck

  1. An' now, buck up, an' don't be scared. – Calvary Alley by Alice Hegan Rice
  2. This night in discourse the Comptroller told me among other persons that were heretofore the principal officers of the Navy, there was one Sir Peter Buck, a Clerk of the Acts, of which to myself I was not a little proud. – Diary of Samuel Pepys, Complete Transcribed From The Shorthand Manuscript In The Pepysian Library Magdalene College Cambridge By The Rev. Mynors Bright by Samuel Pepys Commentator: Lord Braybrooke
  3. In town for a little high life, Buck? – Six Feet Four by Jackson Gregory