Put the meaning into your own words.

Playing loud music outside the study room was inconsiderate.

In a shared office kitchen, one tenant behaved in a boorish way, talking loudly over introductions and mocking another person's lunch. His uncivil reply to a polite request made the exchange more uncomfortable: he told the speaker to stop wasting his time. Leaving his bags across the only spare chair was also inconsiderate of people trying to sit down.