'Okey-dokey is a phrase used to express agreement or approval. It is an informal expression that is often used in casual conversation. The term is derived from the phrase 'okey dokey' which was popularized in the early 20th century. The phrase is often used as a response to a request or suggestion, and can also be used to show agreement or understanding. Okey-dokey is a playful way of expressing agreement or approval, and is often used in a humorous manner.'