Derived from army command "Negative". Taken from "neg". You say "neg with a three" when you say the word out loud.
Freshman: OMG, LOOK AT THAT GANGSTER. LOOK A HIS BACKPACK!!!!
Jon: .... hes a wannabe beaner.
Freshman: NOOO! DUUUDE! OMGOGMOGM! LOOK AT THEM HIGH SOCKS AND SZ XXXXXLLLL JEAN SHORTS! OMG HES SO HARD!
Jon: wow n3g, all he does is go meow meow all the time.