One of my orchestra conductors surprised the ensemble by using slang when no one expected it. He said he wanted to rehearse a passage one more time; he said he wanted it to sound "bad, meaning good!" The orchestra burst out laughing. As he gave the downbeat, and we began playing, he turned to the first violins and declared, "See? I know what bad means!"
I wonder how we would have reacted if he'd told us he wanted the passage to sound groovy or funky.
