They were 'flinging' abuse at each other. [=they were angrily shouting insults at each other]
(..) Everywhere you look I'm Standing in the spotlight Let every creature go for broke and sing Let's hear it in the herd and on the wing It's gonna be King Simba's finest fling Oh I just can't wait to be king! Oh I just can't wait to be king! Oh I just can't waaaaaait... to be kiiiiiiiiiing! (..)1994 The Lion King