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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not much. shortened version of not much. used on msn, etc for lazy people who cant be arsed to type the full word.
"hey billy wat up?"
"nm, u?"
by hello-ther-sailor!! November 26, 2006
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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 30, 2004
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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;Whats Up?
Me;Why don't you just type nothing much you loser.
by Samanthaa* August 28, 2007
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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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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
Pilot 1:How much further until our waypoint?
Pilot 2:About 16 nm
by green-poo December 31, 2009
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