It's Always Sunny in Philadelphia premiered in 2005 as an FX sitcom following a group of self-absorbed friends who run Paddy's Pub in Philadelphia. Its cheerful opening theme became closely tied to the characters' schemes, and clips of the music spread online as shorthand for bad ideas presented with total confidence. Editors reuse it because audiences instantly recognise the tone, even without seeing the show, making it a quick way to frame a selfish plan, a failed hustle, or a moment of delusional optimism.