Definition: Danny1 is a slang term for Danny DeYoung, an American actor. It's used to describe a person who looks like Danny Dittmar (aka Denny), a character from the TV show "The Simpsons." The word has different meanings depending on context: - For fans of the show, it means someone very similar or identical to the original character, which is typically a good thing. - It can also be used to describe an actor who looks like their character in movies, TV shows, and other media. - In everyday conversation, it's more often used to humorously call out something that isn't quite right ("That's Danny1!") or for the "real" version of someone pretending to look just like them.