Okey-dokey is an informal expression used to indicate agreement or acceptance. Its antonyms, or words with opposite meanings, include words like no way, definitely not, not at all, by no means, and under no circumstances. Whereas okey-dokey is a positive response, these words express disapproval, refusal, or disagreement. Other antonyms for okey-dokey might include phrases like I disagree, I cannot commit, I am not convinced, or simply no. These antonyms are useful for expressing a negative opinion or declining an invitation, and can help maintain clarity and honesty in communication.