Definition from Wiktionary, the free dictionary
- (British: material with adult content): Such material is often stored on the top shelf in a newsagent's shop, where it is both less visible and harder to reach without being seen.
- (US, idiomatic) best, or high quality
- (UK, idiomatic) Describing books, magazines, or movies that have adult content, or soft-core porn.
- Jim has a lot of top shelf magazines.