Original: In the 21st century, the word dandy is a jocular, often sarcastic adjective meaning "fine" or "great"; when used in the form of a noun, it refers to a well-groomed and well-dressed man, but often to one who is also self-absorbed.
Simplified: Today, in the 21st century, the word dandy is often used as a joke word to mean "fine" or "great".