Irony is a figure of speech that is used to express a situation that is contrary to what is expected.For example,The irony of the situation is that I passed my driving test on the first try, but my best friend failed.In this example, the speaker is saying that it is ironic that they passed their driving test on the first try, while their best friend failed. This is unexpected because usually people expect to fail their driving test the first time and to pass on the second or third try.