What is your favorite slang word/phrase and why?

My favorite slang phrase is "Bye, Felicia!" This phrase was adapted from a 2005 film called Friday. People use this phrase when they are leaving, but no one else really cares. So basically, the person becomes some random person named "Felicia" who is actually someone who no one really cares about. Therefore, no one cares about their real name and calls them Felicia. You can say this to someone who pisses you off to show them that you need distance from them. The reason that I like this phrase is that it's really catchy and works every time I use it.