lauren is an "old-timer" who was here way back in the day. As I recall, she was in college on a law major. Haven't heard from her in years.
"nm" simply means "no message". On some message board systems, you need to have content in the message field before you can post. So, you write "nm" when all your thoughts are already in the subject line. And, that is your lesson in Message Boarding 101 today!