nbc 

Back in the day, NBC was the king of network television. with hit shows like Seinfeld,Cheers,Frasier,Friends,Will & Grace,Wings,Family ties,The Cosby show,The A-Team,Magnum P.I.,Scrubs, and even My Name Is Earl. I know, some of these show aired in different periods of time. Point is, NBC had a lot of good shows.
Now,ever since they gave Conan O' Brien the Tonight Show at 12:05(not really the "tonight" show"),causing Conan to leave NBC, the network is now mediocre. At one point, it barely lead The CW for 4th place among network television.
This network is a shell of what it used to be. The only shows worth watching on it right now are The Office, Parks and Recreation,30 Rock,and Sunday Night Football. Most of these air on Thursday, so they still have an edge on Thursday night on primetime . They still have Leno and Fallon anchoring late night, so there is a little hope there.

NBC was the most watched network in America. Now, people only watch it on Thursday and Sunday.

nbc by nbcsucks October 8, 2011

NBC 

Nice But Crazy

How come you didn't talk to Lynn more at the party?

She's NBC.

How come?

She left a good husband, a nice house, and her 3 kids so that she could date her friend who has been to prison and plays in a band.

Ohhh......

NBC by DAWhat??? November 14, 2011

NBC 

A unisex term for a virgin.
Stands for "Never Been Cocked" or "Never Been Cunted".
Generally used around annoying little girls that use terms such as NBK.

Karen "Can you believe Angela is NBK?"
Chad "Whats NBK?"
Karen "Never been kissed!"
Chad "I suppose she is NBC as well"
Karen "?"
Chad "NEVER BEEN COCKED!"
Chad "I'm gonna go do something about that"

NBC by Chad and Karen June 17, 2010

nbc 

a grat challel for comedies like my name is earl,the office,scrubs,30 rock,snl(until tina fey left),and conan'o brian

yay,comedy night done right on nbc is on tonight!

nbc by futuramafan February 4, 2008

NBC 

1. Nothing But Crap
2. Not Best at Comedy
3. Not Big in Cable (especially since they dumped Michael Savage)

NBC by Alex July 12, 2003

NBC 

NBC or the National Broadcasting Company

Due to its recent practices of making great TV shows like Heroes, My Own Worst Enemy, and Trauma, and than canceling them after the current seasons wrapped up.

Has led to them becoming a term used to describe someone when they are being an Ass Hole.

NBC is also believed by the general public to be the Worlds Biggest Ass Hole

Examples:

Tom is being a NBC right now.

My dad is such an NBC he won't let me go see Captain America tonight.

Dave is NBC

NBC by P@tty October 2, 2011

NBC 

Nuclear, Biological, Chemical

Yo did you check out the NBC worker in the hazmat suit? he was BANGIN!

NBC by Kinnelon July 14, 2003