Here's a breakdown:
* Formal: You would not use "swanky" in a formal letter, business presentation, or academic essay.
* Informal: "Swanky" is perfectly fine for a conversation with friends, a blog post, or a casual email.
Meaning: "Swanky" means stylish, elegant, and sophisticated, often in a slightly showy or ostentatious way.
Examples:
* "They threw a swanky party at their new mansion."
* "That swanky new restaurant is so expensive."
* "I'm hoping to snag a table at that swanky cocktail bar downtown."