adj; noun

1. Products that are often not new, but could be in first class condition and/or that have been returned opened but not damaged. Usually on a 'first come, first serve' basis.

3. A girl that's not new and fresh, but neither is she damaged goods.

B stock is a unit that was used as a demo unit/ or display model normally by the manufacturer who then sells it to the retail stores at a lower price who then sells it to the public for a lower price.