What does "fall out on account" mean?
I came across the sentence says "Now don't fall out on my account." Would you explain what it means?

Question

Answer

These are 2 separate phrases, Yunah.

'Fall out' is a phrasal verb which means to argue and stop speaking to someone

'On my account' is a phrase which in this context  means 'because of me'.

So: Don't argue and stop speaking because of me

This phrase "on (someone's') account" can also mean to benefit the 'someone'

Example:  'don't bother on my account' means don't bother to benefit just me