Picky means being very selective or hard to please, especially about small details. A picky eater might refuse to try new foods or complain if their sandwich has the wrong kind of cheese. Someone shopping for shoes might be picky about the exact shade of blue they want, rejecting perfectly good options because they're not quite right.

Being picky isn't always bad. A picky reader who only chooses books they'll truly enjoy might discover amazing stories, while someone who grabs any book might waste time on ones they don't like. Scientists need to be picky about their data, and architects must be picky about measurements.

But pickiness can become a problem when it makes simple decisions take forever or when someone complains about minor details that don't really matter. If you're so picky about your lunch that you refuse to eat anything available, you might go hungry. If you're too picky when choosing teammates for a project, you might end up working alone.

The key is knowing when details genuinely matter and when you're just being difficult. Your doctor should be picky about symptoms, but you probably don't need to be picky about which pencil you use for homework.