They were 'flinging' abuse at each other. [=they were angrily shouting insults at each other]
(..) - Because that might mean that you'd have to change. - Don't, don't tell me about my world. Don't tell me about my world. I mean, you just wanna have your little fling with like the guy from the other side of town. Then you're gonna go off to Stanford. You're gonna marry some rich prick... (..)1997 Good Will Hunting