fight among yourselves/ourselves/themselves
To argue or bicker within a certain group of people. I have nothing to do with this, so you guys can fight among yourselves.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
fight amongstor fight among
To engage in mutual hostilities; squabble. Used reflexively: The siblings fought amongst themselves constantly. During our meetings, we always fight among ourselves.
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.