petty

/ˈpɛti/
adjective
  1. Of little importance or significance; trivial.
    • Don't worry about petty details; focus on the big picture.
    • They argued over a petty sum of money.
    • Her complaint seemed petty compared to the real problems.
  2. Showing a mean or narrow-minded attitude, especially about small matters.
    • She made a petty remark about his choice of shirt.
    • It's petty to hold a grudge over such a small mistake.
    • His petty behavior included refusing to share the remote control.
noun
  1. A person who is overly concerned with trivial matters or who behaves in a small-minded way.
    • Don't be such a petty; let the issue go.
    • He acted like a petty, arguing over every little rule.
    • The office petty always complained about minor inconveniences.