Define Nm Meaning

Not Much. Mostly used on im (instant messaging) e.g msn, aim, skype.

perfect way of killing a conversation.

an annoying/lazy way of saying "Oh, I was just sitting here with my thumb up my ass, waiting for you to ask me what I was doing. In fact, let's just stand here and piss away 3 minutes of our lives talking in unclear ambiguous terms about how our day is, what we did five minutes ago, and what we plan on doing five minutes from now."

An abbreviation of "not much" or "nothing much". It is most commonly used in instant messaging conversations as an easy and thoughtless answer to the question what's up.

Some people also use it as an abbreviation for "nevermind", but "nvm" is more popular.

nm is a messenger term that can mean 3 things
1. nothing much
2. never mind
3. no message (comment)

you must be careful that the other person knows what it means.

"Nothing Much"

Nautical Mile.
A unit of length used in navigation; exactly 1,852 meters; historically based on the distance spanned by one minute of arc in latitude.

1 NM = 1.15078 MI

not much. shortened version of not much. used on msn, etc for lazy people who cant be arsed to type the full word.

in the subject line of an e-mail, (nm) stands for no message. that is, the sender is so to the point that he needed only the subject line to express himself, so there's no need for the reader to open the (blank) message.