The skin of a male deer, a buck. / Clothing made from buckskin. / Breeches made of buckskin. / A grayish yellow in colour.

Of a grayish yellow in colour.

(idiomatic, slang) A machine, especially an automobile. Implies that the machine is clunky or unreliable.

(idiomatic) Something of little importance, especially an inconsequential effort or action as compared to a huge problem.

A type of bong for smoking marijuana, usually consisting of a bucket or similar device for holding water, a large bottle with its bottom cut off, and a socket for holding the marijuana in the cap.

(transitive) To fasten with a buckle. / (intransitive, idiomatic) To fasten one's seat belt or safety belt.

(intransitive) To distort or collapse under physical pressure; especially, of a slender structure in compression. / (transitive) To make bend; to cause to become distorted.

(countable) A clasp used for fastening two things together, such as the ends of a belt, or for retaining the end of a strap. / (Canada, heraldry) The brisure of an eighth daughter.

(transitive) To fasten using a buckle. / (Scotland) To unite in marriage.

(astronomy, idiomatic, informal) A reflecting telescope, especially one with a relatively large aperture and suitable for observing deep sky objects such as nebulae and galaxies.