look up any word, like full-donald:
 
1.
Someone who flaunts their intelligence in a derogatory manner.
Jeff from marketing: "Yo Bill, I just learned html and made a pretty decent web site. Wondering if you could help me out here."
Bill from software: "Sorry, I can't talk to you until you can write a cross domain AJAX app with geolocation."
Jeff: "Quit being a nerdbag dude."
by coolfire21 September 22, 2010
 
2.
Similar to douche bag, only much more polite.
You are being such a nerdbag today dude.
by JHolla September 28, 2006
 
3.
(noun)

A) Term used mostly in a derogative way towards someone that radiates nerd.

One who probably:
1. is into anime
2. likes a lot of sci-fi
3. plays World of Warcraft or Dungeons & Dragons on a day-to-day basis
4. goes cosplaying
5. has more than four (4) gaming systems, some of which are not even manufactured anymore
6. trading cards?
etc.
Nerdbag 1: Guys, get ready to attack. Everyone got their special abilities macro'd to their keyboards?
Nerdbag 2: Hold on, I'm out of manna.
Nerdbag 3: Goddamn it!
by Isor April 14, 2007
 
4.
noun: Term for someone who uses bad puns to reference star wars. (or any other pop culture)
Since it is a relatively tame put down, it can be used as a polite way to let your loved ones/friends know that they have crossed a line and should probably stay away from puns forever.
whats for dinner?
wookie steak.
Is it good?
Just a lil chewy.
god you are such a nerdbag.
by lolololoo May 04, 2011
 
5.
(noun)

A) Term used mostly in a derogative way towards someone that radiates nerd.

One who probably:
1. is into anime
2. likes a lot of sci-fi
3. plays World of Warcraft or Dungeons & Dragons on a day-to-day basis
4. goes cosplaying
5. has more than four (4) gaming systems, some of which are not even manufactured anymore
6. trading cards?
etc.
Nerdbag 1: "Dude, what time is it? We might miss the 3 am raid!"
by Isor April 23, 2007