Display Name 

This is a phrase that refers to the name by which people will see you as on MySpace. It can be anything you want it to be, as long as the length isn't terribly long. Most of the time, display names are the name of the person, but people often use them for self-expression.

Some of the display names I've had are (x ,Moderate to Severe, Vapor in the Wind, Speechless, Cradle The Fall and many others.

Display Name by Sifting Through February 14, 2009

display name messaging (DNM) 

Communicating (sometimes fairly subtly) via ones display messages say on MSN! Can sometimes be done in the form of song quotes...

display name messaging (DNM) message: "don't waste your time, we've heard it all before"

(quote from You Me At Six album)

display name messaging (DNM) by The Jammie Dodger May 3, 2010

little display thingy with our names and avatars 

The thing that shows stuff. History dates back hundreds of years to 1999 when they first appeared on web forums.

That little display thingy with our names and avatars on it spelled my name wrong.

little display thingy with our names and avatars by Forum God Of The Universe February 13, 2005