Acronym for Nigger Be Cool. A large stick, bat or other blunt object carried by scared white boys that may ride through the ghetto or "brown town" and may be confronted by angry black men that want to rob or beat them down.
White boy #1
"I gotta ride up to the gas station up on 5th street"
White boy #2
"Thats a rough area I'll go get my NBC stick"