An internal dispute or conflict within a family or organization. Used as a noun and can be expressed verbally (e.g., 'to have an internal dispute').
会社で内輪もめが表面化し、プロジェクトが遅れた。
An internal dispute in the company came to light and the project was delayed.
内輪もめを外部に持ち出すと評判を落とすことになる。
Taking internal disputes outside will harm one's reputation.
役員間で内輪もめが起き、経営に支障が出た。
A dispute among executives arose and hindered management.