pluck up

verb3

1. •
   To remove or acquire by plucking from, for example, the ground; to pick up.

   • "If I could have settled down," I said to Biddy, plucking up the short grass within reach, much as I had once upon a time pulled my feelings out of my hair and kicked them into the brewery wall: […] — 1860
2. •
   To become more cheerful.
3. •
   To summon positive emotion (especially courage); to muster.