Momdom

The internet slang term “Momdom” refers to the dominance or control exerted by a mother figure within a specific context or online community.

Examples:

In a gaming group, if one player’s mother starts dictating how they should play, others may refer to her as the “momdom” of the group.
When a subreddit’s content is primarily focused on motherhood-related discussions and advice, the subreddit is often described as falling under the “momdom” category.