I saw a listicle about 'Nepo babies' of famous people who looked just like their parents, when what they meant is 'child of a famous parent'. Not all of them were in the public eye or attempting to break into the entertainment or sports industry. Nepo baby specifically means someone using their parents' clout or connections to get a career, it doesn't mean 'child of a famous parent' and that kind of annoyed me.
Have you seen any misuses of a word or phrase that has irritated you?