Not Blood Related; Often used to justify a brother-sister relationship. Frequently used in discussion about anime because every anime is actually about hot brother-sister loving.
Ben: That girls NBR is nasty. Too much nipple not enough boob.. If the nipple's too small it feels like you're playing with a guys nipple and it's just not right either.
A healthy NBR is considered approximately 1 part nipple for every 6 parts boob.
Naked Bitches Rule; A sudden revelation of excitement inspired by a seemingly mindlessdominant urge to see naked bitches.
Hey what kind of sandwich are you eating? Peanut Butter... butter...margarine..90% vegetable oil...baby oil... oil wrestling... chicks in baby oil, wrestling... NBR!!!