look up any word, like darude - sandstorm:
 
3.
NBY
NBY = Not Bi Yet, typically refers to ladies who say that they are stratight with no bi experience.
Cath says that she's an NBY... but I'm not so sure.
by Dr. Drew Urban November 17, 2011
 
1.
NBY
Acronym for- Not Bad You
Usually comes from the hick or redneck vocabulary.
NBY,

(Pretty girl walking down street) Buddy says to his friend in the car, "Not bad, you!)

Bill -"hey john, how are you?"
John -Not bad, you?!

John- "Ma, What's for din?
Ma- "Steak"
John- "Not bad, you!"
by Tmanr2011 February 28, 2011
 
2.
A noob exclaiming "no" in a grief stricken way to a fellow noob.
Theo: omg i died :(
Shadow: NBIES!!!
Theo: lololololol
by Degen June 14, 2008