The phrase comes from Glenn Quagmire, the famously flirtatious neighbour in Family Guy, the long-running animated sitcom that premiered in 1999. Quagmire uses giggity as his excited catchphrase whenever he sees something or someone he finds attractive, often followed by goo in the full version. Clips of the line spread through early soundboards, reaction videos and meme edits, where its short length made it easy to drop into almost any scene. It remains popular because the voice and wording are instantly tied to Quagmire's over-the-top personality.