See also: NM (disambiguation). 5b26a
A normal mod (NM) is a mod that is provided without requiring any work from the requesting creator. Normal mods are typically done to get second opinions on a beatmap to help improve it. Many modders use the term "NM" to distinguish it from mod for mod exchanges.
Normal mods are most commonly requested on the forums in modding queues, where modders can personalise which kind of beatmaps they want to see, and mappers can find people willing to help them improve their beatmaps.