Nit-picky is an informal way to describe someone who is overly focused on tiny, unimportant details, especially when criticizing something. It can also be used to describe such criticism. Nitpick (or nit-pick) is a verb meaning to point out the very minor flaws or mistakes in something, or to criticize it in this way.

What are examples of nitpicking?

When someone says you are stubborn only when you refuse to do things their way, it is an example of nitpicking. It is a different case if there are tangible reasons for rejecting the advice.

What is nitpicking in a relationship?

Essentially, nitpicking is a sign that you don't fully respect your mate. Even if this isn't your intention, it can be received this way. Though it can start small, especially at first, it can be a red flag in your marriage. If you continue to nitpick at your spouse, a growing resentment can create a wall between you.