Pet peeves are specific behaviors that annoy particular people. Term comes from "peevish" and "pet" meaning spiteful or bad-tempered. Everyone has pet peeves, some universal, others personal
Used to politely decline discussions about certain topics. Common in conversations about personal experiences
Political correctness means speaking without offending people of various backgrounds. Term first appeared in 1793 Supreme Court case Chisholm v. Georgia. Initially used sarcastically in 1970s-1980s by liberal politicians. Conservatives began using it pejoratively in early 1990s