disorderly fighting; an angry dispute or disturbance.

to dispute or quarrel, often over petty disagreements.

an angry disturbance; "he didn't want to make a fuss"; "they had labor trouble"; "a spot of bother"

an extremely useful word for trouble, or a problem

A bother, something that you'd rather not deal with. "Don't hassle me about the rent, I'll get it later."