The argument caused them to fall out, and they haven't spoken since
His hair started to fall out after the chemotherapy
Be careful not to fall out with your friends over something silly
The shingles on the roof began to fall out during the storm
He was worried that he might fall out of the race due to injury
Hey, I heard Sarah and Mark are having some trouble lately.
Oh really? I thought they were doing great! What's the issue? Did they *fall out* over something?
I think so, yeah. Do you know anything about the specifics, or just heard whispers like I did?
My best friend and I had a huge argument and we fell out
My best friend and I had a huge argument and our friendship ended
My best friend and I had a huge argument and we stopped being friends