Acronym meaning "Never Removed From Box"
Commonly seen for collectible items, implies it is in the original packaging and is "from the factory" fresh.
For Sale: Original G.I. Joe Toy, NRFB
Acronym meaning "No Respect Finger Blast"...
Please don't NRFB my sister while you're on my couch. It's gross and I have to sit there.
Q: Is it possible to give me an RFB?
A: No, there is no respect involved in a good ol' finger blast!