The 'First of All' meme became a viral sensation as the quintessential online 'clapback' format. It typically involves a setup where someone makes an assumption or criticism, followed by a witty, petty, or hilariously specific correction that begins with the phrase 'First of all...' While it gained massive traction on Twitter as a text-only format in 2017, it quickly evolved into an image macro often featuring expressive characters from movies or pop culture. It is widely used to signal a humorous defensive stance or to highlight a minor, relatable detail that justifies one's behavior, making it a staple of social media culture for anyone looking to deliver a sassy rebuttal.