1.
If you describe someone as a no-nonsense person, you approve of the fact that they are efficient, direct, and quite tough.
She saw herself as a direct, no-nonsense modern woman.
ADJ : usu ADJ n [ approval ]
2.
If you describe something as a no-nonsense thing, you approve of the fact that it is plain and does not have unnecessary parts.
You’ll need no-nonsense boots for the jungle.
≠ fancy
ADJ : usu ADJ n [ approval ]