例句-1: "Be careful if you do business with Mr. Green. He's a real wheeler-dealer full of big talk and promises. He knows lots of important people, but he takes some chances with the laws. The best thing you can say about him is that so far he's stayed out of jail."
例句-2: "Some people call my brother a wheeler-dealer because he's made so much money buying and selling real estate. But the truth is he's just smarter than the people he does business with, and I can't see anything wrong with that."
例句-3: "Have you noticed that group of seniors who always sit at that big table in the dining room? They think they're better than the rest of us. If you sit down at that table, they don't even say hello -- they make you feel like a fifth wheel."
例句-4: "My son asked me to come help at his school track meet but I felt like a fifth wheel when I got there: they already had enough people to help so I just stood there feeling useless."