Mod abuse (aka admin abuse) is when moderators or admins of the Repl.it Discord abuse of their power, e.g. changing someones nickname without their permission or request to something that will annoy them. Other examples include muting someone for no reason as a joke, removing a post or image for no reason, and warning someone for a silly thing. There are many confirmed mod abusers, the most notable of which is AllAwesome497.