Hardened sap from trees which is used on violin bows, Bull Rider and Baseball gloves, bottoms of pointe shoes, etc. Helps retain a good grip on something, makes it not so slippery.

A term used to reference cannabis/marijuana/weed.

Cozy.

Stems from an anonumous post-secret "You're cozy, Rosin", created for Canadian rock band Hedley's epic guitarist Dave Rosin. Rosin is famous for being exceptionally friendly and remembering fans' names and details about how he met them.

To rudely enter a conversation without prior context and change the subject to one's own subject matter. Rendering the previous topic null and void and frustrating the involved participants in said conversation.

Rosin us used to address a black person as sweet or cute. Most commonly used by older men. Persons named Samuel and Jonathan are usually the people who are called this