What is the meaning of the idiom "spick and span"?

Neat and clean

The correct answer is neat and clean. The idiom "spick and span" means that something is very clean and tidy, with no dirt or mess. It is often used to describe a newly cleaned or renovated space, or someone who is very meticulous about their personal appearance.

The other options are incorrect. "Dirty" is the opposite of "spick and span," so it cannot be the meaning of the idiom. "Hairy" is not usually used to describe cleanliness, and "courageous" is not typically used to describe the physical appearance of something.