1. Keep up the good work!; Keep on doing it.; Keep (on) trying. Jane: I think I'm doing better in calculus. John: Keep it up! Sally: I can now jog for almost three miles. Fred: Great! Keep it up!

2. Just keep acting that way and see what happens to you. (Compare this with (Go ahead,) make my day!) John: You're just not doing what is expected of you. Bill: Keep it up! Just keep it up, and I'll quit right when you need me most. "Your behavior is terrible, young man! You just keep it up and see what happens," warned Alice. "Just keep it up!"