A sarcastic tone is a type of speech or writing that uses IRONY to mock or convey contempt. It is often used to make a point or to express a strong opinion. IRONY is a figure of speech in which words are used in a way that conveys the opposite of their literal meaning. For example, if someone says 'That was a great job, ' when they actually mean the opposite, they are using IRONY to express a sarcastic tone.