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1.
Nightwing is Dick Grayson, the first Robin. He left Gotham and founded the first Teen Titans and later turned from Robin to Nightwing. He patrols Bludhaven, a sad crime-ridden excuse for a city.
Robin matured... a lot. Rawr.
by Raven January 17, 2005
 
2.
The original Robin, also known as Dick Grayson.
Quite possibly the coolest part of the Batman everything.
Nightwing is a badass mofo with long black hair and ninja moves. Very shweet!
Dude 1: Dude! Batman is on! Let's watch!

Dude 2: Is it the one with Nightwing?!?

Dude 1:...No.

Dude 2: Well fuck that then!
by Josh-o-matic November 30, 2008
 
3.
A Nintendo Fan Boy
You're a Nightwing! Leave my PS2 Alone! NO, PUT AWAY THE SLEDGE HAMMER!
by Nikolas September 16, 2003
 
4.
nightwing a large memeber of the rat family. often found enjoying a slice of gamerpie while masturbating to man porn at his home pc.
you sir, are a nightwing.
by Daniel October 06, 2004