Lower Intermediate - Criticising people
Before you start criticising and commenting on people, make sure you look in the mirror first and ponder upon yourself, Mr. perfect!! In today's dialogue, we have such a guy but he hears good advice, to stop, from his companion.
In the first line of the text the preposition "fy" can be rendered literally as "in". Cf. the following example from George Eliot's "Silas Marner": (...) the parson had wanted to know whether the pedlar wore ear-rings in his ears (...).