A useless 2 letters which can mean one of he following two things when somebody asks whats up?

Not much.

Or the more common one of..

I cant be bothered to tell you, so no much.

It is a real conversation maker which could lead you no to the same conversation you always have.
Person A: Hi
Person B: Hi
Person A: Whats up
Person B: NM, you?
Person A: NM
Person B: Cool
by Ryan Riggs September 19, 2007
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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.
Subejct: Your house is on fire. Run for cover. (nm)
by Zen06 June 19, 2005
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A way to kill an unwanted conversation which usually occurs with someone you dont like!

NM=Nothing Much
Guy1: Hey Man Whats Up?

Guy2: NM

Guy1: Oh i see how it is Asshole! way to kill the convo!
by B_RAD69 May 26, 2009
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This is one of the many annoying "chatspeaks" that illiterate dumbasses use because they can't take the time to write it out.

If not much is going on, can't you take time out of your boring life to type "not much"?
Bob:So, whats up?
Bill: nm
Tiek: Can't you take the time to type out "not much"?
by Tiek October 31, 2004
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Probably the most annoying excuse of a word ever invented. Used mostly in Instant messengers and text messaging it is a way for the other person to show you that they could give a shit about what you think/do/exist etc... it stands for "nothing much" and should never be used by any man or woman. and if used tell them they are a fag and should go kill themselves.
Bob: yooo.
Fred: Eyy whats good kid?
Bob: nm.
Fred: Your such a fag man you should go kill yourself.
by I69HARD!!! November 24, 2009
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Quite possibly the most annoying "Word" knows to the "English speaking nation." shortened, or "1137" way of saying "Not Much."
Its just that our time has gotten to lazy to type nothing much, which is stupid because if your not doing anything you should be able to type "Nothing much".
Me;Hey
loser;hi
me;Whats Up?
loser;nm
Me;Why don't you just type nothing much you loser.
by Samanthaa* August 28, 2007
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