argue over something petty or unimportant
bicker - argue
To ‘bicker’ means to engage in an undignified argument with somebody, usually about something trivial. It is typically characterized by heated emotions and irrationality rather than any form of reasoned debate, which is why children are often said to bicker. When adults do it, especially in the workplace, it is a sign of immaturity and unprofessionalism.
You’re not being rational, and I do not want to bicker with you, so please just leave me alone.
Why are you two bickering in the middle of the office? That’s not how you should behave in a professional environment.
Those two always bicker over who does what task. They are so immature!