NM

NM is an acronym that stands for "not much," and is typically seen online or in text messages. It may be used to answer a variety of questions but it is often used as a response to "What's up?"

The answer is typically employed by people who don't have anything cool to talk about or simply do not want to share any further details about the things going on in their life. The acronym is particularly popular amongst teenage boys.

In other words, "Forget it" or "Don't worry about it;" also written n/m.