When a player in an orchestra or ensemble, usually the leader, really gets into the music and emphasizes their movements when playing. It often involves swaying as their musical lines ebb and flow.
- "Check out the lead violinist, she's really giving it rice."
"Yeah, awesome!"

- "Look at that soloist give it rice!"
"Man, that guy is amazing!"

Last night, hit a good lick. I brought home three figures easy for about two hours worth of my time. Not too bad I don't think.