The term 'O.K.' is an informal way of expressing agreement or APPROVAL. It is often used as a response to a question or statement, and can be written in various forms such as 'YEAH', 'YES', 'NOD', 'its', 'FAIR', 'FINE', 'good', 'isee', 'JAKE', 'soso', 'SURE', 'ALLOW', 'LEGAL', 'LEGIT', 'LICIT', 'roger', 'sayso', 'ASSENT', 'NICELY', 'UNHURT', 'agreeTo', 'ALRIGHT', 'APPROVE', 'CONSENT', 'CORRECT', 'ENDORSE', 'allright', 'APPROVAL', 'assentTo', 'iApprove', 'notSoBad', 'PASSABLE', 'SANCTION', 'ALLOWABLE', 'authorize', 'hunkydory', 'notTooBad', 'ACCEPTABLE', 'ACCEPTANCE', 'PERMISSION', 'stampOfApproval', and 'storybookEnding'. All of these words are ways of expressing agreement or APPROVAL, and can be used in place of the phrase 'O.K.'.